Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06a8142570d4b6a…

MALICIOUS

PDF

81.2 KB Created: 2021-09-05 00:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ae6ea7f655eab8fdd4cc527e5c80dfb6 SHA-1: 746c02f0ffb31f01974f719c21d11431fd8dee67 SHA-256: d06a8142570d4b6a2b3fe5cfe59665960a49324855277f5d89d5bbe9a9cde02c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to lure users into clicking malicious links. The presence of multiple links on disposable hosting and compromised CMS uploads reinforces this malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/efbdfcf0a829b9666a99047958cd43d3/58998457154.pdf In PDF document text
    • https://wsbtitan.com/images/file/20985273318.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610fdd9d12dfe---25338081818.pdfIn PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/gugudidabotil.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/kego38datr4p8i1qv6sukjoqh2/bodovup.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/48779556019.pdfIn PDF document text
    • http://edison76.com/clients/5/54/54c13950cbd15a81e6fb4362eab8f273/File/53753758520.pdfIn PDF document text
    • https://chemasan.lu/userfiles/files/17498985571.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/45348853673.pdfIn PDF document text
    • http://poiskvod.ru/images/file/63325640892.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/xenuvetam.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/b3lsm06qt3uaefdah4d10o0nmn/33391364337.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/17008700973.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/51590920531.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/80241898799.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fee67909d---vipefugogixagikonegivi.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021072417043873499.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210512033143170.pdfIn PDF document text
    • http://www.lalorraineperdue.com/documents/dilusajorinof.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70351459348.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3f00b61ad---43154210880.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/samenegopazaz.pdfIn PDF document text
    • http://udaybharat.in/ckfinder/userfiles/files/wivebixaresij.pdfIn PDF document text
    • http://ipllaser.in/uploads/37332235788.pdfIn PDF document text
    • http://unseretochter.ch/images/file/kefubonumutibanutewu.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/93814600256.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=print+as+book+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF273 10544 bytes
SHA-256: ded00ea5ee4d90b28fc71ef71dd1b7a82849fbe92f04dd9ebb9a1183bc35dfac
font_02_sfnt_off00010a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A59 17480 bytes
SHA-256: a95a465972c2d23599d34cc1071c92580fd6583c71459ecb12fdd0204bdd9cb4

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