Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12d68902499b61f…

MALICIOUS

PDF

72.9 KB Created: 2021-02-16 03:22:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b929efcfc2076c484d4c7c923b3e2c70 SHA-1: 703db3d09a9910e7799e6be14dc7f3db7372bd49 SHA-256: a12d68902499b61f3028624d87d0b57dacf3f41f9eac51985c799ccf7bef87f4
196 Risk Score

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 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://jacksth.ru/wix?keyword=adt+control+system+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489041/normal_60270d185fb06.pdfIn PDF document text
    • https://nefotinabe.weebly.com/uploads/1/3/5/3/135314884/f8380092709ed4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412902/normal_5ff821930f1df.pdfIn PDF document text
    • https://fefugenaxidoseb.weebly.com/uploads/1/3/1/3/131380158/911ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387807/normal_5ffa179b09d56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_5fe771417882e.pdfIn PDF document text
    • http://gezawazerige.iblogger.org/crosswords_answers_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385869/normal_5fd8c5ea2357f.pdfIn PDF document text
    • https://diwekivoveludu.weebly.com/uploads/1/3/5/3/135313391/6b3e237b2f38a.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/nagudo/zuwok.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/caffeine_mac_app.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/ceo_full_form_in_police.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/jufasavevedivovoje.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/2911467893.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_off0000e228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE228 5176 bytes
SHA-256: 0cf42c2e697c64b65f46ac665ca3c4fbf6317cd6cecb8e627c326af2f3ab0fd2
font_01_sfnt_off0000f3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AF 10412 bytes
SHA-256: 31c15b6045e8bb4503fc0e6b96eae3492ff4619667f0d1c0990fa65d702c3f59