Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af9b464c596e3d1…

MALICIOUS

PDF

89.4 KB Created: 2021-03-16 00:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 75f3325f05dbb7e222eb5eb6fb7b8eed SHA-1: 8502cdc0f17f6401f7fe93c080f160f9c19f0d92 SHA-256: 0af9b464c596e3d1e4ddadcd18947ae5d547cfbcd797d3e8252b0be432333798
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/strik?utm_term=blodgett+convection+oven+reviews PDF link annotation
    • http://azorocheat1.xyz/murray_42_inch_mower_deck_beltilyv1.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/girl_scout_law_and_promise_philippines5odbs.pdfIn PDF document text
    • https://tusixifowidafoj.weebly.com/uploads/1/3/1/4/131437116/988d014.pdfIn PDF document text
    • https://cdn.sqhk.co/wejemabip/Ghav7gd/xibizokotimamojovakogiru.pdfIn PDF document text
    • https://gowexafej.weebly.com/uploads/1/3/4/6/134621848/778e42e9.pdfIn PDF document text
    • https://pepesavujol.weebly.com/uploads/1/3/1/0/131071240/pafavodotopozave.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/cbhibie/12619275599.pdfIn PDF document text
    • https://sipadaguw.weebly.com/uploads/1/3/4/3/134322090/legemanawu_wofozojewuvaga_wizajul.pdfIn PDF document text
    • http://xuratalusat.22web.org/16091208711.pdfIn PDF document text
    • http://ylyn.ru/ielts_speaking_makkar_may_to_august_2019hya1v.pdfIn PDF document text
    • https://cdn.sqhk.co/wasefago/ijM5DW8/kijisabaxogaju.pdfIn PDF document text
    • https://gapurosudezejug.weebly.com/uploads/1/3/5/9/135965954/lujofosiwo.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/Yfgjhh9/badmashi_hd_video.pdfIn PDF document text
    • http://just-gopro.com/wodeje0x3j.pdfIn PDF document text
    • https://sinukofulav.weebly.com/uploads/1/3/4/6/134634738/2722194.pdfIn PDF document text
    • https://cdn.sqhk.co/kosadara/fjfWjjU/dragon_craft_kits.pdfIn PDF document text
    • http://reduslimitalia.site/cdma_workshop_2.7_cracked_download559ij.pdfIn PDF document text
    • https://doxavigefixo.weebly.com/uploads/1/3/5/3/135391607/tipikonur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lenukedemagi.epizy.com/64104609154.pdfIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_5010e392cef64353ab5cf5970e42f271.pdf?index=trueIn PDF document text
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_f571c8e2c15749edbef5050889713471.pdf?index=trueIn PDF document text
    • http://puwevaladimeve.epizy.com/vukagube.pdfIn PDF document text
    • http://jupojef.rf.gd/9451250347.pdfIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_5dd2216957924b27bb7fd01cda3a7bbd.pdf?index=trueIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_17916e9f1efb42b284860d78c0a7b02f.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_off00011dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC6 5100 bytes
SHA-256: 1854ff0bd6df90464ba8d8081431d5fe80eedc86425bf3d70c28e25e2364c698
font_01_sfnt_off00012f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4A 11548 bytes
SHA-256: 62205a57e3b2692351693ec3a37e0e796d54bb18d5aa062126808b9703dd600d