Malicious PDF — malware analysis report

Static analysis result for SHA-256 31373505686b3fc8…

MALICIOUS

PDF

67.0 KB Created: 2021-02-19 19:49:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 862756ecbdba123dd2bd4c8b0f686534 SHA-1: b1ac0ad20384a13222350668d8578c361f9441c3 SHA-256: 31373505686b3fc82a562569698ce1c43d7d0051c0e00a277e2be0c4fbc9a95b
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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=first+alert+co710+carbon+monoxide+detector+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451754/normal_5ff69340b95aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495988/normal_60263bf707948.pdfIn PDF document text
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/54fc2b3c89eda5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5feaf660be0bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366018/normal_5fe4ff16e6279.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://webexewidulub.epizy.com/sap_eclipse_adt.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/bhojpuri_film_bidesiya_song.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/dilufavikoxafivojumid.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/trail_cameras_that_send_pictures_to_your_phone_verizon.pdfIn PDF document text
    • http://wajiletum.epizy.com/el_nacionalismo_musical.pdfIn PDF document text
    • http://gotenekopibijo.epizy.com/grapher_2._0_free.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_off0000ca16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA16 5524 bytes
SHA-256: ea8e39ed2b6d6106e9595d797025cc1d491695d3e1b61ca27082c29ff4f7b339
font_01_sfnt_off0000dcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD0 10052 bytes
SHA-256: 0185b8aaa0859a232b81c6ce25cb7f7b06b5dcaf0e7a2171b3c8bd3e3d8839db