Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f26a33abb1f6aa2…

MALICIOUS

PDF

80.6 KB Created: 2021-04-23 17:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 86763e6292790c3d0b65e0c4b6fd48c2 SHA-1: a8f097779e15c6e6627eb8ed4f0561715f1ed37d SHA-256: 7f26a33abb1f6aa2a1315fa02f7e21b9d8a79e06d7440e87799391ed5fbe91ad
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The document body, though heavily obfuscated, contains references to 'lg front load washer drain pump repair' and is associated with numerous URLs, many of which are on disposable hosting and appear to be part of a link farm. This suggests a phishing or malware distribution attempt, likely using the document as a lure to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://golowaki.ru/strik?utm_term=lg+front+load+washer+drain+pump+repair PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421770/normal_6003e8d1c3f31.pdfIn PDF document text
    • http://uscreditscore.info/wesivetujavobodubakuseg5yr8z.pdfIn PDF document text
    • http://bajifepeselok.sportsontheweb.net/gifetiruvum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412599/normal_5fc6a2d71ed61.pdfIn PDF document text
    • http://mishgen.com/denoriruvudixig5i71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427499/normal_603a47c21324f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379855/normal_604758a4dd65a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409395/normal_60666327f180b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_6046ee8d291ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_60364e8d018f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485718/normal_5fe93c579d189.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea2964a-f07b-4898-b692-28adc2834720/universal_laser_systems_parts.pdfIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_160d5424e6f441c9ab3fdd826eb01b15.pdf?index=trueIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_310c47ad017c4c0fbfb4f8e7a4d8425f.pdf?index=trueIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_a8b2c95bed9a4f6c847a275c7b714b2b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfa78818-cc26-4c55-91bc-59c5e5b54e2f/linda_costanzo_physiology_free.pdfIn PDF document text
    • http://dawejur.atwebpages.com/salidebewogexite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28808d55-2c8f-46e4-b2a4-71cb0bb2c4ed/kjv_bible_concordance.pdfIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_48f2b8bbf844444cb43ef637e9ce3cfa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/003a73c1-75d7-4cea-a0bd-ff4fd5f6129f/35828622790.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD9 5488 bytes
SHA-256: 544fdbf36ae4bb9c94164034538c88693be46c87e536aa979e210a58821a999f
font_01_sfnt_off00010f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F79 10996 bytes
SHA-256: eb758808982acd215e63593b6692a32704703782973831d0bb50c96821b7d824

Open this report in the interactive analyzer, or submit your own file for analysis.