Malicious PDF — malware analysis report

Static analysis result for SHA-256 40f6bcfaea3c2cc6…

MALICIOUS

PDF

74.7 KB Created: 2021-03-10 08:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4a71c084661876678ba6e9decfaecd00 SHA-1: cb497f7f2ae01916d2f634aec84032bac435ce40 SHA-256: 40f6bcfaea3c2cc69dc2eacc16a65a0307fdaf5d7a657ecdf70dcd1e12e34f36
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://crophysi.ru/123?utm_term=happy+birthday+song+name+wise+free PDF link annotation
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/jifevixazimubup.pdfIn PDF document text
    • https://duxegebipuvakij.weebly.com/uploads/1/3/4/0/134095857/gifir.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/ajb5gcL/fodabesoramiru.pdfIn PDF document text
    • http://albatros-trans.ru/71148914861jnmcd.pdfIn PDF document text
    • http://getveran.site/75980163510ytxmu.pdfIn PDF document text
    • http://grigolia-studio.ru/dka_nice_guidelines_20170eyfh.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/UzkMkkG/20361389196.pdfIn PDF document text
    • https://dipitamadupod.weebly.com/uploads/1/3/4/8/134882687/7025433.pdfIn PDF document text
    • http://sayseedokg.com/nenaxerevabebekivufapoi40b7.pdfIn PDF document text
    • https://gisonegeviwobi.weebly.com/uploads/1/3/1/3/131383673/vujivoso_linajoza_norikipupexu.pdfIn PDF document text
    • https://cdn.sqhk.co/rudugebakivo/sMjjies/sandeep_maheshwari_wife_and_son.pdfIn PDF document text
    • https://cdn.sqhk.co/xumupojamax/dtgefbB/48152031478.pdfIn PDF document text
    • https://cdn.sqhk.co/pewonogip/qohd4jb/24869577774.pdfIn PDF document text
    • http://luminar3-download.xyz/add_and_subtract_fraction_word_problems_worksheet8f4zc.pdfIn PDF document text
    • http://mavitrade.com/zejujafxt041.pdfIn PDF document text
    • https://cdn.sqhk.co/forexidof/jjzif0y/jufijavuboribeno.pdfIn PDF document text
    • http://azalea.store/34818137273ggjmr.pdfIn PDF document text
    • https://cdn.sqhk.co/vovusupa/IGqtggS/51714921479.pdfIn PDF document text
    • http://myshoes.moscow/549939189463t6hj.pdfIn PDF document text
    • http://lady-bug.club/48200660910xjyws.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_fbed5847bac14e97b402246c0106db5d.pdf?index=trueIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_9f1971da96e341a2ae937e07d6f3ed89.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_off0000e628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE628 5720 bytes
SHA-256: 6f381e2097b2f99a29ca20c4877d982d3a0c6471629f3929bd48037b88affb8f
font_01_sfnt_off0000f986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF986 10568 bytes
SHA-256: afd8c6eafa15143ac96040f023da67e82b85fc1d06570b0ce5021b2093dbd479

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