Malicious PDF — malware analysis report

Static analysis result for SHA-256 081646fcc19ba475…

MALICIOUS

PDF

144.1 KB Created: 2021-02-22 16:56:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1431580c79ebe0cf20028f19c914a95c SHA-1: b40b8f099e6c2f12bdd4cc45e6dfff645551d0ef SHA-256: 081646fcc19ba47582dd9c9cb7acb225de7d6a0be9abe2e5794041233e98d9c6
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically pointing to a 'wix' keyword search, suggesting a phishing or redirection attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a link farm designed for SEO manipulation, likely to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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 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://jacksth.ru/wix?keyword=love+live+lyrics+quiz PDF link annotation
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/3328670.pdfIn PDF document text
    • https://gabodubelekopo.weebly.com/uploads/1/3/4/3/134356924/5551498.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472491/normal_5fcd6d341ba3e.pdfIn PDF document text
    • http://instapriz24.online/99875299495a8eg4.pdfIn PDF document text
    • http://bestita.space/2891770353213hvf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475376/normal_603247721a961.pdfIn PDF document text
    • http://vadinesejel.22web.org/microsoft_project_standard_2016_free_trial_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_602abb1ac4fbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468814/normal_5fc5b42c0ba4b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://dofovomomame.epizy.com/27766635167.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/aha_cpr_guideline_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/bodusutesudipewiravoz.pdfIn PDF document text
    • http://vopimivukaf.epizy.com/27857741698.pdfIn PDF document text
    • http://pumovumibabir.epizy.com/zubasujifu.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/31521252135.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18842 21936 bytes
SHA-256: 4b142fdde43b0b538c132803db88b0caa6303ad7423eb406616225b97aaed1fc
font_01_sfnt_off0001ce70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE70 4864 bytes
SHA-256: d9428c976e396c78a033d887afc1957c1c047cec4c1360e1bc0a87758eb24253
font_02_sfnt_off0001df2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF2E 2152 bytes
SHA-256: d95dc0def613fe23f1a8c9fe05eb470c93a2e1c6612ba6c98a1533f856b7a591
font_03_sfnt_off0001e844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E844 2688 bytes
SHA-256: 43bf3388ad270109195829104525ecc151a64507c21de1acac407dc5d1655fd0
font_04_sfnt_off0001f299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F299 10600 bytes
SHA-256: 33fedd54bad2ab5c00f17335c389f1bc58727e420f0b81f89ccada447e59afe9
font_05_sfnt_off000216ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x216EF 17384 bytes
SHA-256: d412abc710a67b65806afb07c95ad55c8d0e2e5c0871b7f0b574fc6a5e9fbdfb

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