Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a8ff5b9dff7ee1…

MALICIOUS

PDF

85.8 KB Created: 2021-06-19 11:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4f31b543c806c92392617225c93007d0 SHA-1: 579aa64a3776d969adfc81b3d732249439e77933 SHA-256: 01a8ff5b9dff7ee12c4e01a73a70983b546bdd0a2da0b24effa9f7a0b989a712
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document contains a link farm structure, with numerous URLs pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and link farm indicators strongly suggests a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/1609b5d5a4fbb5---63269864058.pdf In PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609966d5dd858---figuwimoxaxeme.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/netasopiminema.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/6si4fjirlkg66kv8cjfov6h3m5/keguvoduwepupasise.pdfIn PDF document text
    • http://simonide.org/userfiles/file/86200842703.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8bf39a32d---nepiwumu.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/94d5b374fab9f38305e8a92d2df513d4/gerexa.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/e8c0a83029cdce8aede04c8c08b20e37/45296143645.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/pogoda.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/35f3a7d09c731bcfdfb320b83636d16f/vavadojekinakotegerinimuk.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/bac852765ceaeeba663dfa2983c229c4/wojizodikatev.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d00ad85485---jufezobomiso.pdfIn PDF document text
    • https://ubranni.com/uploader/files/79011130820.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/44190048395.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=lakdi+kathi+dj+songPDF 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://scripts.sil.org/OFLIn 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_off0000c5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E3 5040 bytes
SHA-256: 0a8875964187587970e45303dc272a5a4c8076578341adb951221b9d0bf5dc4f
font_01_sfnt_off0000d709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD709 5688 bytes
SHA-256: 0df4cab1294f27e225bcad6ce63a9d3f8db2b249748cd5fbb481e25b1c7e7284
font_02_sfnt_off0000eb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3F 11680 bytes
SHA-256: 96259173c57125992d664f10192f14d58fcc66e39aaa36921c20745a73648e7b
font_03_sfnt_off000112a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A6 17816 bytes
SHA-256: 9d7b78393264f6309f47d4e88687d64ffcf9f14395d2099667b01958f6fd3d37
font_04_sfnt_off00012d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D65 8568 bytes
SHA-256: 218efefe5e839137b45e85bf5ae468af8601497e55cdf7f358da31784ca8b521

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