Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a6cf1fe2e4f9d2…

MALICIOUS

PDF

70.6 KB Created: 2021-02-12 00:50:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 12eb7391a9129a74e431aa578ccfc56b SHA-1: c013d5989c4468eaeb511d10a57992fcfe0df391 SHA-256: b0a6cf1fe2e4f9d24ab747b527014964543e5cc5a8736ce8aeee5da11b583b43
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://maypoin.ru/wix?keyword=sign+apk+apktool PDF link annotation
    • https://sovejugi.weebly.com/uploads/1/3/4/6/134652237/juzal.pdfIn PDF document text
    • https://runanusug.weebly.com/uploads/1/3/5/3/135313332/mofevibinozivomo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443576/normal_5ffc84b552dfb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496597/normal_5ff46444c11a6.pdfIn PDF document text
    • https://bemujegifa.weebly.com/uploads/1/3/5/3/135312506/perugeganomire_ronajuw_gadawolu_woxan.pdfIn PDF document text
    • https://jozinuzo.weebly.com/uploads/1/3/2/7/132712000/f7c5f87e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489843/normal_60014aa78cc39.pdfIn PDF document text
    • https://pasojifet.weebly.com/uploads/1/3/0/7/130776368/7018794.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/davubewu/wevubadoferogibade.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/michelin_guide_2020_uk_and_ireland.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/teaming_agreement_sample_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/davibowabesagulorevoferuz.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_off0000d312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD312 4880 bytes
SHA-256: 135422d39760f432fe6e4b550670fc5d97a6cb3070b32ecfeefcf84290519443
font_01_sfnt_off0000e3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C8 13228 bytes
SHA-256: 864678d4e79c81916c655e3e7268f31a8e8211c7d91ca033ecc46747db086814