Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7fd63fc307344d…

MALICIOUS

PDF

72.7 KB Created: 2021-02-24 14:15:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cdf98f628034ee876be51becf4beb784 SHA-1: 0fc30bb286dd06ff8c2930c7138ff21f6f7ba050 SHA-256: be7fd63fc307344d6e61cb74721f5024708a34af95731e7c36f098749577ef08
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=tart+or+pie+crust PDF link annotation
    • https://cdn.sqhk.co/befozaxulot/bgcKjcx/53584179076.pdfIn PDF document text
    • https://tumafikajenama.weebly.com/uploads/1/3/5/3/135326798/kogowuvule-pigogiretokujug-konizibu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376599/normal_5ff1348303408.pdfIn PDF document text
    • http://zimipamus.22web.org/wodor.pdfIn PDF document text
    • https://vojowejejetolor.weebly.com/uploads/1/3/0/7/130775680/4877067.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451566/normal_6006683373e5a.pdfIn PDF document text
    • https://futiwoku.weebly.com/uploads/1/3/5/9/135957929/2940767.pdfIn PDF document text
    • http://mirror-x.org/65046178914f878k.pdfIn PDF document text
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/pukilusarisomajap.pdfIn PDF document text
    • http://alcexpress3.xyz/ontario_apartment_rental_agreement_formhygku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500450/normal_60161e4350f11.pdfIn PDF document text
    • http://kawlites.online/zizapazoguzovorif0drwg.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/xakapudakadu/escort_cards_wedding_template.pdfIn PDF document text
    • http://pukuwatisapejo.rf.gd/un_grito_desesperado_de_carlos_cuauhtemoc_sanchez.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/mibobogukozafuxarelute.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/47429944361.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/new_army_uniforms_pinks_and_greens.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_off0000e2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A0 4844 bytes
SHA-256: e28faf5b971d272139ccdc645bc450cd34a82ab56fa8480e33a8883d8f49410c
font_01_sfnt_off0000f326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF326 10240 bytes
SHA-256: 32c0e1c06af241e14356b21e1ad118583bc3c87d79edf3a7718870b5862c0596