Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3733cc79dc31382…

MALICIOUS

PDF

82.1 KB Created: 2021-01-26 16:50:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2c68b6f1d680b8d25e5db7e4e1fc6262 SHA-1: d7ef5856361feda1c66cfea463399edcf9bdff2b SHA-256: d3733cc79dc31382c1cdcbdf72d324f20fabc6a4976bb67f40af4e7250256080
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://trafficel.ru/wb?keyword=ballpoint%20pen%20artwork PDF link annotation
    • https://nuravodabola.weebly.com/uploads/1/3/0/7/130740537/3d27c12f4bd48.pdfIn PDF document text
    • http://cocobeautybar.ca/51112299674ssnu1.pdfIn PDF document text
    • http://igcopyrightforhelps.com/251020455569kpm8.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/bioquimica_libros_gratisde8m0.pdfIn PDF document text
    • http://swiss-family.space/nutagarodijubedagolugadesqmynw.pdfIn PDF document text
    • https://cdn.sqhk.co/xobevopu/hC8cibv/day_r_premium_hack_mod_apk.pdfIn PDF document text
    • https://witowufagefalob.weebly.com/uploads/1/3/0/7/130738848/zanujinijuwiranefowe.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/lEicie9/slice_potatoes_kitchenaid_food_processor.pdfIn PDF document text
    • https://xafasujogi.weebly.com/uploads/1/3/4/3/134374351/3814273.pdfIn PDF document text
    • https://vibitaxipeni.weebly.com/uploads/1/3/4/5/134526550/tawodawu_dedaparuzulufe.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/tawovojo/ruxigiji.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/weripolimupazisigizudovij.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/33052245536.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/kexabeporanix.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/wajewibures.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_off00010576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10576 4840 bytes
SHA-256: ba376f2e4f23bc6426ed12ec3ed15951013edeef7d02e4fc31f526afe5f74719
font_01_sfnt_off00011610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11610 11216 bytes
SHA-256: fa7ae765793dcb13893953f56bff277a5ee94846e8f6bea3c0644df9f0349e17