Malicious PDF — malware analysis report

Static analysis result for SHA-256 af761197fc8538ac…

MALICIOUS

PDF

53.7 KB Created: 2020-11-06 16:50:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f93c32a39791f48e9df445218d6d799 SHA-1: 92cc91fc3bf44b4a8814cb88f5aa8c471d248dcc SHA-256: af761197fc8538ac79bef0f3902ee9706f7c1e9ffe1d6791d17554f9aadea0fa
116 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are part of a link farm designed to appear as legitimate content. The primary URL suggests a lure related to DMV appointments, a common tactic for phishing or scam operations. While no scripts were explicitly extracted, the PDF structure and extensive external linking indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://trafffe.ru/aws?keyword=dmv+florida+pasco+county+appointments
    • https://cdn-cms.f-static.net/uploads/4410206/normal_5f9831be70492.pdf
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/8323cfa44.pdf
    • https://rofexigu.weebly.com/uploads/1/3/0/7/130738805/ziretesidamam.pdf
    • https://cdn-cms.f-static.net/uploads/4368240/normal_5f8952fcb340b.pdf
    • https://cdn-cms.f-static.net/uploads/4446773/normal_5fa4062930058.pdf
    • https://regajuwanuduxis.weebly.com/uploads/1/3/4/3/134319991/pofesajemekosiga.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/tunitulo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/dejolavubukugeb/creative_destruction_mod_apk_2019.pdf
    • https://s3.amazonaws.com/fatisake/25723336917.pdf
    • https://s3.amazonaws.com/henghuili-files2/endometritis_treatment.pdf
    • https://s3.amazonaws.com/jobavo/84534814737.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007985.bin
a812399423382ced0661ae07c2b344900293c57f39344cb58dc41ae55e861a42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7985 5344 bytes
font_01_sfnt_off00008ba0.bin
a7b12cb20737771b0bcd8005968c62aa8485644b5b933250330c273c233adbcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA0 2244 bytes
font_02_sfnt_off000095ca.bin
650b0e7e644ef72b84e7ee059de1b646f1fd72f9ec7c8d36c736b620d5947273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95CA 10948 bytes
font_03_sfnt_off0000bb36.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB36 4324 bytes

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