Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb6e32bc38b6798…

MALICIOUS

PDF

82.6 KB Created: 2021-03-09 23:51:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7044966730ed98ff6efb67203516ab8f SHA-1: 7ed59be5d3a93371db945541a02bf02e08b779f6 SHA-256: afb6e32bc38b67985bbcda718d32d3eb2ec7e8c98f29a7c6f4db4258e54b344f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this as a phishing or malicious PDF. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to lure users to malicious or SEO-abused content, potentially as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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://lozipotod.ru/award?keyword=capral+aluminium+extrusions+pdf PDF link annotation
    • https://galojonebe.weebly.com/uploads/1/3/4/3/134353990/vovoledefo.pdfIn PDF document text
    • https://wuwilosuz.weebly.com/uploads/1/3/4/3/134394730/bakikisewepit_miwujuz_tewil.pdfIn PDF document text
    • http://cyberghost.store/George_calombaris_thermomix_receptend0rlh.pdfIn PDF document text
    • https://luwojasog.weebly.com/uploads/1/3/1/3/131380471/3002803.pdfIn PDF document text
    • http://oyuncuxx.com/kupuwefogew30km2.pdfIn PDF document text
    • http://pinerapidsrr.com/jamurubaxebizojadbqimm.pdfIn PDF document text
    • http://pmaider.com/ergonomic_hazard_assessment_formtdxey.pdfIn PDF document text
    • https://kadexatazi.weebly.com/uploads/1/3/4/6/134648676/lowuxexevabebonar.pdfIn PDF document text
    • http://vexamukuzudeb.iblogger.org/better_english_speaking_skills.pdfIn PDF document text
    • https://tenadugal.weebly.com/uploads/1/3/2/7/132740541/9415285.pdfIn PDF document text
    • https://pupikitonusu.weebly.com/uploads/1/3/5/3/135301263/kunoveruxapejuku.pdfIn PDF document text
    • https://zanefasijim.weebly.com/uploads/1/3/5/9/135965469/febodaluboziwiv.pdfIn PDF document text
    • https://veguxalefimas.weebly.com/uploads/1/3/1/3/131382166/gagazise.pdfIn PDF document text
    • https://metiganad.weebly.com/uploads/1/3/4/6/134659194/faa218.pdfIn PDF document text
    • http://faxadiweruxu.22web.org/alphabet_handwriting_worksheets_for_adults.pdfIn PDF document text
    • https://busonuvawariba.weebly.com/uploads/1/3/4/3/134355681/xilulewenob.pdfIn PDF document text
    • http://nout-prokat.website/86914053765iyvu1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fuzonojidufube.epizy.com/top_hits_2018_album.pdfIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_d66b73a377f44c4b839b5eec98f1b175.pdf?index=trueIn PDF document text
    • https://3d5b2cfc-74f5-4c02-8466-0d369b02955c.filesusr.com/ugd/69b86f_4e2406c1834a48488b93d50956873de5.pdf?index=trueIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_918c2193105f46579e1ed48b65d8915d.pdf?index=trueIn PDF document text
    • http://dusiwesidixe.epizy.com/how_to_get_a_medical_waiver_for_the_marines.pdfIn PDF document text
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_61260b83fb10403a8be6a55bb1cc53a3.pdf?index=trueIn PDF document text
    • http://nuzavaxevarap.epizy.com/64205584982.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91D 5160 bytes
SHA-256: 97920fba2666184de947dc8459966c3045e39ca4a4c33ceffea994c62f39f6b4
font_01_sfnt_off00010a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A98 10672 bytes
SHA-256: 8c6f2b5991a3a68cad188bdca9a564643b6afbb0b782094ab006ee6de22f9833
font_02_sfnt_off00012ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC8 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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