Malicious PDF — malware analysis report

Static analysis result for SHA-256 754600629c358ca2…

MALICIOUS

PDF

87.0 KB Created: 2021-04-01 05:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 746e0fd32233c6f2e005a4a497f02de8 SHA-1: b5cf41134e2b6b17fc180f50b683b30543f12975 SHA-256: 754600629c358ca2f1a7e1f53c32a8f59970ae02996b8a32f8f91798453c790d
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 0.9996

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://pelibifir.ru/strik?utm_term=what+does+it+mean+when+your+dryer+won%2527t+dry PDF link annotation
    • http://wunuxuvi.sportsontheweb.net/27481409235.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/976a3bba2b.pdfIn PDF document text
    • https://guwadutu.weebly.com/uploads/1/3/5/3/135347148/8109011.pdfIn PDF document text
    • https://nogulumu.weebly.com/uploads/1/3/4/4/134476008/9595cd64f913.pdfIn PDF document text
    • http://jipolavex.medianewsonline.com/65589346200.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_e4907aa739b746f2a3c5ff064c5d577f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/zojof.pdfIn PDF document text
    • http://gibuvelulano.rf.gd/rumegodonimususalur.pdfIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_0e5c85f3537a4c84bb0a34216810979e.pdf?index=trueIn PDF document text
    • http://nupituf.epizy.com/88348697457.pdfIn PDF document text
    • https://0633afab-057d-4448-85e1-ac1a97571725.filesusr.com/ugd/66920c_808b24e6a7a94fcb8c136f5255916a6a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/death_note_movie_light.pdfIn PDF document text
    • http://visugog.myartsonline.com/maharashtra_open_caste_list_in_marathi.pdfIn PDF document text
    • http://bituwevemexeku.rf.gd/74464966983.pdfIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_d3226282b5bd4c929799165523e0f011.pdf?index=trueIn PDF document text
    • https://f85e9a30-dbb9-40fd-a66d-53bd7daafe07.filesusr.com/ugd/1b9faa_1d7e99138b6b4bcc9a925f6484650d24.pdf?index=trueIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_7ac342a767034e55986ab0849c622612.pdf?index=trueIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_e15b84ae67cc496e86ff109984894b5f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/54912588518.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/falodute.pdfIn PDF document text
    • http://kitasiru.epizy.com/55193222471.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11542 5272 bytes
SHA-256: d7ddf1ea73889c819465d4758feb4b6be06a593a98506e2e562150f27f338016
font_01_sfnt_off00012725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12725 11516 bytes
SHA-256: e10c27887f790510bc82b2a57ca566b2f5d40094b38e0c4a3cf0cf494068269c

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