Malicious PDF — malware analysis report

Static analysis result for SHA-256 084ffcbfa7731608…

MALICIOUS

PDF

82.9 KB Created: 2021-06-09 22:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: bd138ff376ba7468a27678c840c083f2 SHA-1: aed5822936a9e00182eb9d701380c983ec707ff8 SHA-256: 084ffcbfa7731608bbb033df913fd8849cf10487a7e798efc4e52c7e1282f5fd
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The heuristic 'SE_CALLBACK_LURE' indicates the document may be designed to trick users into calling a fraudulent support number. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or scamming operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jacksth.ru/123?utm_term=capitec+bursary+application+form PDF link annotation
    • https://dejixujulazefe.weebly.com/uploads/1/3/4/8/134867847/7056357.pdfIn PDF document text
    • https://wipolupenigikof.weebly.com/uploads/1/3/2/7/132712614/resirazelawapis.pdfIn PDF document text
    • https://vokijovagugudis.weebly.com/uploads/1/3/0/7/130776016/fc4b6d28.pdfIn PDF document text
    • https://wekexodaxax.weebly.com/uploads/1/3/4/7/134713384/zitagimeb_kimifabi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471240/normal_5fe0cb6dae1fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450731/normal_60538c070a4c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481061/normal_606e81bb309a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422378/normal_6011efbc8989f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487187/normal_5fe3391392987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456140/normal_6020c11362398.pdfIn PDF document text
    • https://bovejivisesuja.weebly.com/uploads/1/3/1/3/131384116/536389.pdfIn PDF document text
    • https://dadekubezaxinis.weebly.com/uploads/1/3/2/7/132740399/tivunixazozo.pdfIn PDF document text
    • https://kimimidinom.weebly.com/uploads/1/3/1/4/131453749/5399410.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fixiguru.pbworks.com/w/file/fetch/144456606/91717785595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edfa3301-f3a2-4d18-8571-0816eb8cd389/31274850787.pdfIn PDF document text
    • http://togusan.pbworks.com/w/file/fetch/144650082/moral_of_the_boy_of_the_three-year_nap.pdfIn PDF document text
    • http://gupiguna.pbworks.com/w/file/fetch/144895764/kamisama_hajimemashita_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a54f5a6f-046b-46d3-9cbd-825927930660/zupivi.pdfIn PDF document text
    • http://fozujedax.pbworks.com/w/file/fetch/144895377/one_ui_3.0_download_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d13db1ef-90c7-419f-8955-56428a0773a7/87460422567.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48D 3380 bytes
SHA-256: e7fcce69d1a25d106c6b0cacf9c7c496933c364ebfbc2c44e6150c50f5fb08d6
font_01_sfnt_off0000f0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AA 5308 bytes
SHA-256: 197b85fb1b656a4ba09ab0d0ef45a7a2767d35a00466bccf22f41f8aa6cdd3b8
font_02_sfnt_off000102a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A2 10964 bytes
SHA-256: b2f197906e96f8ec3e58b41bd465fec58c9b362cfc3fca1e7891873eb6ad3ba8
font_03_sfnt_off0001282d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282D 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf