Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96a7f1cf007abc1…

MALICIOUS

PDF

86.9 KB Created: 2021-03-07 10:32:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: febb5cb3d122405336611fa6c0d36488 SHA-1: 336b09fca8cb529148598c23370eecd04b81c22c SHA-256: a96a7f1cf007abc1b3f1a1f0852219164ae0efe6ad74d101ab3a32a974577406
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO spam operation. The primary URL suggests a lure related to 'Arctic king portable air conditioner problems'. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely for phishing or driving traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://xezojetit.ru/strik?utm_term=arctic+king+portable+air+conditioner+problems PDF link annotation
    • http://fulusixavopowem.iblogger.org/edittext_with_search_icon_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388285/normal_5fecb39e58629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_600efcfd59ca2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458623/normal_5fd78b1591068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385202/normal_60329f55bc18a.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/the_human_animal_desmond_morris_quotes.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/50965198287.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403410/normal_6006990a9f4fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426547/normal_5fe673f69fd3e.pdfIn PDF document text
    • http://juwaniwabi.medianewsonline.com/dungeons_and_dragons_5e_players_handbook_color.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475570/normal_603ec3a34d16f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456135/normal_5fdd937b6c673.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417205/normal_5fdcb422dd34f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451352/normal_5fef17152eef4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_604140265f9f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://teworubinogo.epizy.com/wepabuparujilas.pdfIn PDF document text
    • http://nodixuzotegiv.rf.gd/cover_letter_block_format_spacing.pdfIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_6a1284ab6642445a87b238c11ab740e2.pdf?index=trueIn PDF document text
    • http://netomadutimafe.onlinewebshop.net/positive_effects_of_volcanoes_on_humans.pdfIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_ec5bc564c53a468ba6207d40fc2f0cd8.pdf?index=trueIn PDF document text
    • http://nosigegu.onlinewebshop.net/sig_p226_extreme_review.pdfIn PDF document text
    • http://gutolagewu.rf.gd/sijuvefagirapilagedufis.pdfIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_9b6cf07327124bf2a56b60d2b3ebe872.pdf?index=trueIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_5e1f1dc839424b57aa6188b7167b53c9.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10794 5372 bytes
SHA-256: 71213c0a512d68f5766f829c21189c509ebf81b8510bc6b381dc70082a7cf617
font_01_sfnt_off000119ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AE 11004 bytes
SHA-256: 290834e25589cbd87767f310ca7433a14e0a2a8dab025e0b91450fad9526a333
font_02_sfnt_off00013f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34