Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27a71d5f2371ec9…

MALICIOUS

PDF

72.4 KB Created: 2021-02-13 14:42:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 301d3e597ba47dfddacd2f951a84a171 SHA-1: d6586cfa8f214bcf69c2acda49c2b8b13c9187ed SHA-256: b27a71d5f2371ec9df6a6395f42d88eb72cef6fc09792dc78331f88b2fd6fc58
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://baarspo.ru/aws?utm_term=domestic+partnership+agreement+form+texas PDF link annotation
    • https://ziresaro.weebly.com/uploads/1/3/4/5/134509830/lijafobe.pdfIn PDF document text
    • https://xadixolikiz.weebly.com/uploads/1/3/1/3/131380305/4765569.pdfIn PDF document text
    • https://gebekogekikak.weebly.com/uploads/1/3/4/6/134694855/lulufuf_vowofotevuzasu_sujid.pdfIn PDF document text
    • https://tusululobiwivet.weebly.com/uploads/1/3/1/1/131163859/munugigulen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_60268708d15c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487399/normal_5fe181585d1a9.pdfIn PDF document text
    • https://puruvafapazono.weebly.com/uploads/1/3/0/8/130815059/649a3f64.pdfIn PDF document text
    • http://qiwi-wallet.online/nazag11sih.pdfIn PDF document text
    • http://prizinsta.site/torusd6nn1.pdfIn PDF document text
    • https://cdn.sqhk.co/jigixomavola/s7aihJr/cara_top_up_ml_dunia_games.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/D8pW9ii/gyro_buster_redeem_code.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/pibajuwi/backgammon_free_mac_os.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/best_guided_sleep_meditation_for_insomnia.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/abs_home_workout_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/bukegivivon.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_off0000de29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE29 5464 bytes
SHA-256: 5ca34b426bdac696d54556d54977b35d589d26a1a9ccf372fb71d4ed0a88afda
font_01_sfnt_off0000f0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A7 10508 bytes
SHA-256: 783b7187323bd7c7258c6fce0f7358144148ee6760533b5cfbe1a20ea65609d0