Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54e10eed35be009…

MALICIOUS

PDF

77.9 KB Created: 2021-03-26 07:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3321b955068c090a1664776b97cbe450 SHA-1: c11a71a9eedd5b89791ef87595c241b5f52eef42 SHA-256: d54e10eed35be0097e817bf898ce39d46467e9661fc2a70acb0a3b25376b9458
194 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL and the document body's deceptive content, masquerading as a search result, support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=urgent+care+wauseon+ohio+phone+number PDF link annotation
    • http://xulubapatoso.scienceontheweb.net/35460834489.pdfIn PDF document text
    • http://xunetokawetik.sportsontheweb.net/gujarati_baby_girl_names_book.pdfIn PDF document text
    • https://katolafafesol.weebly.com/uploads/1/3/4/4/134479470/lopowijem_tususi.pdfIn PDF document text
    • https://gapepaweduli.weebly.com/uploads/1/3/5/4/135400658/2357308.pdfIn PDF document text
    • http://dapujabowigu.sportsontheweb.net/storytown_grammar_practice_book_grade_6.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/zetowovixe_mewabijeton_boboxuben.pdfIn PDF document text
    • http://xivazokib.medianewsonline.com/votifipojedegisuzonoba.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/agnes_heller.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/revesidirevu.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/what_is_object_oriented_language_in_c.pdfIn PDF document text
    • https://dijajogid.weebly.com/uploads/1/3/0/8/130874349/d1e85570cf0219.pdfIn PDF document text
    • https://mibugekokedepi.weebly.com/uploads/1/3/2/6/132682655/mekixabeg-femabolarazu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zaxexopufo.epizy.com/vobozexanabed.pdfIn PDF document text
    • http://wusutinewipus.epizy.com/bopasoxure.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/ejemplos_de_alcanos_alquenos_y_alquinos.pdfIn PDF document text
    • http://lesexugisitu.rf.gd/what_is_the_process_of_making_wine_step_by_step.pdfIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_d31bc4e5501145d1ab95a93a621fbf41.pdf?index=trueIn PDF document text
    • http://wadoromutisagar.myartsonline.com/abbie_hoffman_steal_this_book.pdfIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_e863ee5c17a6422d95de8197da3a5494.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rumezo/15839948099.pdfIn PDF document text
    • https://9a1eab6f-da2d-4a41-99bb-18a59f11b130.filesusr.com/ugd/c2b690_26c3f3e599fc41e5a6c2cde0bd30d318.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_off0000f085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF085 5540 bytes
SHA-256: 7eaaa3dc77798f1b9c39588c85ee67cd2ee77d58f02f200cb9be94edf5eb5a9b
font_01_sfnt_off0001034b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034B 10832 bytes
SHA-256: 7a2c2097e7472b23283ed6bbd1743b80dcde31bf1d909356f30a6f3497c6d10b

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