Malicious PDF — malware analysis report

Static analysis result for SHA-256 71218a419a42bb94…

MALICIOUS

PDF

130.6 KB Created: 2021-06-29 14:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 438f23647b2db2ad9c45caffc3d19d3d SHA-1: cb9d69dc3caead0ea441441dd21bd51bc7dc0eaa SHA-256: 71218a419a42bb9499f2cf36ace042fd355e44c1a2d51f69b409fc8502a26fc8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9567

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97995baf3c---kubozibowusisidewon.pdf In PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/lifewopakoxelokokubimax.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/2519289855.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160acb20b926ae---migig.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/27631504095.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2910d5181---zomul.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb02f125acb---80285594388.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/250544ad87cfac608cb814b60e1136b0/kirorolidakutegafemuwiki.pdfIn PDF document text
    • http://houselandia.ru/files/30876629432.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/70737687205.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/6ee54fd46ecf8707d8a3d5734da0bbc1/1008619676.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/004i5nenu8floi4p4fjbbf2ie0/nudulugo.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a9782f476df---89708589160.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/17652de54dfe9edafaf127f4d469e24c/gofadikoninumib.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/c21f7fc3ea2cfe964335cbbccbb89e8e/43877630918.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/16895143216.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609be87ab20ea---jevigatol.pdfIn PDF document text
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/39999947738.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4e842b7c5---20556563975.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/ninumugotaxukexasex.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc57b049393---xanokajusonesuwaleka.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/68430510191.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/71038182878.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607a339f66d59---72588547155.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d875d3af62---fitimojanaroritakad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=chinche+insecto+en+inglesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FBA 23028 bytes
SHA-256: edcb19c5dbd5c4955f8f8f3dec0e32415398447fe3caea2bbbbcf62df024b772
font_01_sfnt_off0001a894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A894 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001c0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0AB 10276 bytes
SHA-256: 801e8d5ac00e7d4019e6dbafe219e9378458a59f96cd1ec4042f024728f41a17
font_03_sfnt_off0001d7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7BA 2384 bytes
SHA-256: b337caa5173463928754652904a7a8a98f1b0906da411461fdfa58a4b1f722a6
font_04_sfnt_off0001e204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E204 16948 bytes
SHA-256: b90b24203209fe6d3f6ecc992773050bbe8c387f9afc577d29ba102c9812741b

Open this report in the interactive analyzer, or submit your own file for analysis.