Malicious PDF — malware analysis report

Static analysis result for SHA-256 7542bb703aa0b898…

MALICIOUS

PDF

66.4 KB Created: 2021-02-15 19:26:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f51166ab3326bb56d4cc9a20f7984927 SHA-1: 8b21def1260c7ace672d4a54b441de93e334212f SHA-256: 7542bb703aa0b8989a342dfc9e6db142da5fda4fa7bc6d656f91aaf772b6ecc8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/wix?keyword=big+time+rush+lyrics+windows+down PDF link annotation
    • https://vegipojefatelon.weebly.com/uploads/1/3/4/8/134876486/4e20f6a4.pdfIn PDF document text
    • https://fewojejano.weebly.com/uploads/1/3/4/3/134348079/gileme.pdfIn PDF document text
    • https://ladufuvugekowek.weebly.com/uploads/1/3/4/1/134108614/vebarunimo.pdfIn PDF document text
    • https://zatuzura.weebly.com/uploads/1/3/1/4/131453499/99e1a5ff5.pdfIn PDF document text
    • https://sajolunuweto.weebly.com/uploads/1/3/1/4/131407571/0d8f7170d.pdfIn PDF document text
    • https://pulaberiboz.weebly.com/uploads/1/3/0/7/130775840/sigalokazarege-dabaseraje-zuvebesinix.pdfIn PDF document text
    • https://suzagosezamonu.weebly.com/uploads/1/3/4/4/134446802/2aae51bf.pdfIn PDF document text
    • https://selijejexo.weebly.com/uploads/1/3/0/9/130969160/5655937.pdfIn PDF document text
    • https://puxorubawi.weebly.com/uploads/1/3/5/3/135349856/26feb0a01e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/zejuganovaguxesarodafo.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/megogo_android_tv_4pda.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/whirlwind_axe_quest_guide_horde.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/3804766506.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_off0000c9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EF 5388 bytes
SHA-256: af72f3f80669dec4d525e266fd89fbd5093fa3b098f98bb8093b3385938d1637
font_01_sfnt_off0000dc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC35 9540 bytes
SHA-256: 173fcfea0f84c78825fb50b9149cb5de2ef53044aaef7e53fd8cda25be52e1fa

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