Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d929d2d2dd8016…

MALICIOUS

PDF

77.5 KB Created: 2021-03-27 17:22:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2334f4594c1badfc063473e5baaac964 SHA-1: 2a758062dbafc828d6e7785aa3a069cdbcf30614 SHA-256: 20d929d2d2dd80169b86b22d7c84c9c0e2db9f794d70870951dbbf9ccdb2d0f8
186 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, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to 'evicted pdf free' and application metadata, which are likely lures to direct users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • 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://pelibifir.ru/wix?keyword=evicted+pdf+free PDF link annotation
    • https://cdn.sqhk.co/wubunepan/egghYjj/ropudeponizuvizu.pdfIn PDF document text
    • https://cdn.sqhk.co/ferobisuw/YjdLgd1/victoria_by_the_sea_restaurants.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/TRcqjja/21806752241.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/ajeuJjc/89033002313.pdfIn PDF document text
    • https://cdn.sqhk.co/kixikeli/gPIkifz/wupepawifowozidewavur.pdfIn PDF document text
    • https://cdn.sqhk.co/kapopuvida/if7o2hg/37682655671.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/mitavakijezaru.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/gc4Qgi0/15182142809.pdfIn PDF document text
    • https://kodopagedo.weebly.com/uploads/1/3/4/3/134350575/vilukafubukagu.pdfIn PDF document text
    • https://cdn.sqhk.co/bodavadu/jqH9c55/65795442249.pdfIn PDF document text
    • https://pilopumif.weebly.com/uploads/1/3/4/7/134733378/4402610.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/S9jfjX3/76522821981.pdfIn PDF document text
    • https://cdn.sqhk.co/jokalirubore/iihgggW/netflix_cuties_review_rotten_tomatoes.pdfIn PDF document text
    • https://mosugomepa.weebly.com/uploads/1/3/4/0/134096926/xadiduzafekim.pdfIn PDF document text
    • https://zemomopefiku.weebly.com/uploads/1/3/4/6/134614162/ff1445e55a9c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_0456f996483b43b1b924f43823a6c216.pdf?index=trueIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_a49a1aaa5fd94ca99499b01319e70e28.pdf?index=trueIn PDF document text
    • http://zabesawafusoxa.rf.gd/pufapedap.pdfIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_5a40630370c94e55b5cf0a22ab428b55.pdf?index=trueIn PDF document text
    • http://xifuxedoka.rf.gd/66902135531.pdfIn PDF document text
    • http://rozesefotuduwef.epizy.com/beating_the_streets_by_peter_lynch.pdfIn PDF document text
    • http://melufisagaw.epizy.com/suma_y_resta_con_notacion_cientifica_ejercicios_resueltos.pdfIn PDF document text
    • http://roxemab.epizy.com/famabebizudunu.pdfIn PDF document text
    • http://vopisatewegom.rf.gd/powidewanadufawo.pdfIn PDF document text
    • http://wesokojoposad.epizy.com/tukabomibunobavezawurotoj.pdfIn PDF document text
    • http://robajev.rf.gd/to_kill_a_mockingbird_by_harper_lee_characters.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_c4fa5ff268364e89bbb8ca737dcae610.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF478 4748 bytes
SHA-256: c15e07ae942020b83ef6077da79e10d58c28ae84b8b9a25288160f2f5ced0b00
font_01_sfnt_off000104bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 10504 bytes
SHA-256: 23857c3abc6f52c65c90a7cf44f8945de52326afc006d59f832a1afc2bb1b7b5