Malicious PDF — malware analysis report

Static analysis result for SHA-256 6091ad5e8ba031ea…

MALICIOUS

PDF

77.5 KB Created: 2021-02-16 21:15:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0566b3c1c4864e6f9b2cc0fa31563953 SHA-1: 54bdd3346106132e6ed53454dc4826a78a846d30 SHA-256: 6091ad5e8ba031ea6993ef78af2acefdd0a5d7534f2ed05880c2b051c4493ae6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO poisoning tactic. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • 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://leonvi.ru/wix?keyword=mta+civil+service+exam+study+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381102/normal_5fdbffc676c06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387419/normal_5ff064609b48e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382962/normal_60027c418e64b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416305/normal_5feed06a272af.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/a4ac22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_60207ace1e34f.pdfIn PDF document text
    • http://fredo.bike/durango_wildlands_beginner_guide3su5v.pdfIn PDF document text
    • https://luwozupewudaxu.weebly.com/uploads/1/3/1/3/131384663/2fea86ac58a95eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377414/normal_5feb16bf7edb6.pdfIn PDF document text
    • https://tarakemutelomul.weebly.com/uploads/1/3/2/3/132303353/1b2a07b53489d2.pdfIn PDF document text
    • http://edarudost.online/mumokidikudefitenutqlu.pdfIn PDF document text
    • https://ferofetilusef.weebly.com/uploads/1/3/5/3/135346026/rerogotine_wedamol_wutedufuf_jimidemuguza.pdfIn PDF document text
    • http://leopolds.space/averages_from_frequency_tablesae20r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_600f5942ab2d3.pdfIn PDF document text
    • http://thefortykuti.com/2772655511194tyb.pdfIn PDF document text
    • http://differencecheats.net/50440779748r8lke.pdfIn PDF document text
    • http://uscarinsurance.info/85543047540queaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fufibilola.epizy.com/rakegawuxoditulamodamal.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_off0000f002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF002 5708 bytes
SHA-256: 4a35a2c16b7976509018901bada5cfe9de1ac9a7358191b9337035cd0a2e1845
font_01_sfnt_off0001037c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037C 11024 bytes
SHA-256: 78aa1eb6ec7ee510ad0fc1213ff35751adf3aa3088de44102e2e941e90e46867

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