Malicious PDF — malware analysis report

Static analysis result for SHA-256 76cb805fffd1151b…

MALICIOUS

PDF

37.4 KB Created: 2020-11-08 15:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5b0e9dd346afcfc9438a09510b5eabb5 SHA-1: 644a00c053a2b3606d9099ab2070ed2db6b9a034 SHA-256: 76cb805fffd1151bf3ff436d734ac0a02e7db448fb9cec991b4827db2a920a87
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafffi.ru/aws?keyword=the+girl+he+never+noticed+wattpad PDF link annotation
    • https://fewusivusezul.weebly.com/uploads/1/3/4/2/134236316/4381802.pdfIn PDF document text
    • https://kumaneke.weebly.com/uploads/1/3/4/6/134682587/6024675.pdfIn PDF document text
    • https://juwememuju.weebly.com/uploads/1/3/4/5/134523402/bebojob-besujul-xanoxoju.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/6087544.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/7fd292c.pdfIn PDF document text
    • https://buxiniti.weebly.com/uploads/1/3/4/3/134309366/mudovagul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f8744d4245a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403951/normal_5fa4e99cbec14.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/tobobowu/water_words_word_whizzle_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/bcbs_of_georgia_prior_auth_form.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/aircraft_design_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/32297053197.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/18976020627.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/causes_of_biafran_war.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/dakokeruz.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_off000054db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54DB 5260 bytes
SHA-256: 866abd1605eddb8bfcc896426e84d9a54f4517cdd8d624d4a7225cb0bdca848e
font_01_sfnt_off000066ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CE 9928 bytes
SHA-256: cc6ad69ae6facc998124e6b6b525d590a4723f6f7d14f0ea02c5871073738614