Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75a9e5595c15b5d…

MALICIOUS

PDF

85.3 KB Created: 2021-03-22 06:13:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 250a48cc00488eb5828929b163917534 SHA-1: b170454c2bc44c68a349f62272a67c075c327683 SHA-256: c75a9e5595c15b5d2884cf1479169e305d6d751e5d1751e7d285b2fd76f9feae
134 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. It uses an invoice-themed lure. 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 0.9997

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://fokemale.ru/wix?keyword=website+development+agreement+pdf PDF link annotation
    • http://wusozupu.mypressonline.com/embodiment_theory.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/georgia_learners_permit_book.pdfIn PDF document text
    • http://gopidap.scienceontheweb.net/gafekexilidotibakisa.pdfIn PDF document text
    • http://kujinatazema.sportsontheweb.net/xukavuketuzajepidopaki.pdfIn PDF document text
    • http://welutotadaxol.iblogger.org/advantages_of_value_stream_mapping.pdfIn PDF document text
    • https://vimedijo.weebly.com/uploads/1/3/1/6/131606629/dikemowowel_gujetibevapi.pdfIn PDF document text
    • http://vuzetasavuxoso.mygamesonline.org/soal_apbn_dan_apbd.pdfIn PDF document text
    • http://nosixavol.sportsontheweb.net/74000408084.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/95402972865.pdfIn PDF document text
    • https://ledapenilodaro.weebly.com/uploads/1/3/1/0/131070651/8523220.pdfIn PDF document text
    • https://rolafaxamowoti.weebly.com/uploads/1/3/4/9/134903079/lutasamesoradezexuwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nopuxawox.epizy.com/overwatch_mercy_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/83573211879.pdfIn PDF document text
    • https://df1d5e35-4e67-4e57-ba41-6141a32c4ecb.filesusr.com/ugd/c54278_f52a9466d46142f6b43c7c42e46d3c96.pdf?index=trueIn PDF document text
    • http://wofeduvep.rf.gd/54490199208.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/vagilaxitimejazozu.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/jatixenaloxesabagoxul.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/19775222006.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/67755826116.pdfIn PDF document text
    • http://pewazeje.rf.gd/54212534449.pdfIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_09bb86474c734b49b246374b612e58f9.pdf?index=trueIn PDF document text
    • http://gemawinikifiv.myartsonline.com/vevuxureguvevipu.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_off00010f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0F 5572 bytes
SHA-256: 4f7beca961e05a8a2a710bd52f50a89409a9d6f428e8940cb2b5464b89c35f72
font_01_sfnt_off000121f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F6 11132 bytes
SHA-256: d73f6eda81fe8db5cabe651a0f0976fbc8b26e0218194cac95ba106fb51092a4

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