Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ae7e7a4a8453e6…

MALICIOUS

PDF

73.7 KB Created: 2021-03-24 13:58:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7141f342320a95945bbbd92cde2a87c2 SHA-1: 14d34e7abdee39554ee4f21e71c1f2f09421b61f SHA-256: 29ae7e7a4a8453e6f63cc471eb88162a1b9673bd2ece835c00789eba435f1ca5
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 0.9991

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://bologen.ru/wix?keyword=business+law+fifteenth+edition+pdf PDF link annotation
    • http://xufelaketodo.getenjoyment.net/35316440024.pdfIn PDF document text
    • http://kufejat.sportsontheweb.net/91871700128.pdfIn PDF document text
    • https://tagaxaxe.weebly.com/uploads/1/3/5/3/135390661/wexosaxagubaxatiruze.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/84524815857.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/blackout_poetry_examples.pdfIn PDF document text
    • http://zokugorevat.mywebcommunity.org/troy_bilt_2700_psi_pressure_washer_175cc.pdfIn PDF document text
    • http://small-italy.space/wedapogumejonotifachal.pdfIn PDF document text
    • https://fifubinagate.weebly.com/uploads/1/3/4/8/134854053/9bd37.pdfIn PDF document text
    • https://dorubirema.weebly.com/uploads/1/3/4/3/134317311/7883400.pdfIn PDF document text
    • http://alex-chekalev.com/lezufetuxojaguzifawoxei1xni.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/hp_scanjet_5590_price_in_bangladesh.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/jugeduduritikipuregeves.pdfIn PDF document text
    • http://letinebab.mywebcommunity.org/31914461948.pdfIn PDF document text
    • http://davorivugexawu.sportsontheweb.net/auriculoterapia_ansiedade.pdfIn PDF document text
    • https://bogekivusuwi.weebly.com/uploads/1/3/4/6/134604255/putipar.pdfIn PDF document text
    • https://tuverasoxodos.weebly.com/uploads/1/3/4/7/134745130/c051b1e10ccae5c.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/candy_to_word_convertor.pdfIn PDF document text
    • http://bibivire.mygamesonline.org/92348652141.pdfIn PDF document text
    • http://tryadasert.online/sumubus4pmvm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://02314edc-d025-420b-9d62-795437f25c47.filesusr.com/ugd/4f0fc1_6642733f64ef4bb89b1e56950e418cb7.pdf?index=trueIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_dfabbcd908ff4a4aa45d0563ac645934.pdf?index=trueIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_2be14b53465845309f20c97169f9bc9b.pdf?index=trueIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_a6531d7c946147b39593be307a9aff0f.pdf?index=trueIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_61e279d47561415c981fbcd4b0a0d1cd.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_off0000e3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FC 5176 bytes
SHA-256: 16ed8f492853908a8c4bbf745c1dbbb3d39533c10b4f69437e3e19698f4c4571
font_01_sfnt_off0000f5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B0 10284 bytes
SHA-256: 07a740b52767d551b9d88de8c9102f34a88475314807d70e7b8233c9ef5dd050