Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f253cab7a3af97…

MALICIOUS

PDF

100.9 KB Created: 2021-04-08 22:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b57006c25edc977b5023c54288abbb22 SHA-1: 7d77617b90233189f700d54ba6ba6dcdda1ba9d9 SHA-256: 92f253cab7a3af97d96793c0fff3c1e763a6a9a1495a594124860824039e6f41
146 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ClamAV as Pdf.Phishing.Trojan. The 'SE_CALLBACK_LURE' heuristic indicates the document prompts the user to call a phone number, a common tactic in callback phishing and tech support scams. While no scripts were explicitly extracted, the presence of external links suggests a potential for downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://botokaw.ru/strik?utm_term=viva+water+dispenser+cleaning PDF link annotation
    • https://cdn.sqhk.co/zojixemem/id3Hiii/62678100586.pdfIn PDF document text
    • http://ionatr.fun/fukudamifetar60j0.pdfIn PDF document text
    • http://pressit.space/giwutegalepafodogay9ab8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386609/normal_60621a215f893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488335/normal_604a177063e72.pdfIn PDF document text
    • https://cdn.sqhk.co/galudubujuwa/gug1iaw/5081735964.pdfIn PDF document text
    • http://copyrightshelpscenters.com/national_curriculum_standards_for_social_studies_bookmirk0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472506/normal_5fe49f3885d9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402520/normal_6044d02c01a97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489976/normal_600e53f0aad39.pdfIn PDF document text
    • http://juzufezike.mygamesonline.org/65770169447.pdfIn PDF document text
    • https://cdn.sqhk.co/belumozobu/b1ibfpY/can_knockdown_carnival_game_how_to_win.pdfIn PDF document text
    • http://pixxel.life/adventure_capitalist_unblocked_weebly3g095.pdfIn PDF document text
    • https://cdn.sqhk.co/jilebodetifa/xadaRhf/77542156181.pdfIn PDF document text
    • http://afracheat5.xyz/lord_of_the_rings_cast_nowlv3y4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lenofafezanobu.atwebpages.com/rawat_jalan_adalah.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001302d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302D 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off00013ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF1 2960 bytes
SHA-256: 4c688c0676da4c9c3f1d636d29496b85ed1f90b4285ee9b780884cc7de0e34ac
font_02_sfnt_off00014a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A61 5360 bytes
SHA-256: 3b88b885b4a7361e19c8ffecff7378f9a5e15bd43e6805a4eaee0844c0102716
font_03_sfnt_off00015cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CC6 12092 bytes
SHA-256: 991143b973d12a3687c37274bb623fd3cc7a07992ea9d3e0468598edc445e532

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