Malicious PDF — malware analysis report

Static analysis result for SHA-256 b041f295c52571b8…

MALICIOUS

PDF

68.1 KB Created: 2021-02-24 01:27:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a9f80f3023df9f420ccc36b06b704a7d SHA-1: 330174affe9eb4518fa0f7503976702ae64f8fe9 SHA-256: b041f295c52571b82acf0c3a9ab120dbcfab7fd0bf14861411560c5ebfebec3b
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://bologen.ru/wix?keyword=gates+belt+design+guide PDF link annotation
    • https://cdn.sqhk.co/kifavubivelo/9gjZHVR/depemotixoxav.pdfIn PDF document text
    • https://pikarazumubujon.weebly.com/uploads/1/3/1/4/131452816/mugisifisi.pdfIn PDF document text
    • https://kukitame.weebly.com/uploads/1/3/1/3/131379641/wololaxuko-luwig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388842/normal_5fcc209b383e8.pdfIn PDF document text
    • https://cdn.sqhk.co/gasariba/iaoUMvr/mebarizaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384296/normal_602a6ff764dc4.pdfIn PDF document text
    • https://cdn.sqhk.co/telazaje/xQhcoeg/89339946632.pdfIn PDF document text
    • http://jeruxawi.iblogger.org/helmet_of_salvation_template.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/nejolu_vorok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451375/normal_5fd055e46675d.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/aIicBpJ/662194782.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/vojapu/93755912936.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/18830333889.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/basara_2_heroes_ppsspp_ukuran_kecil.pdfIn PDF document text
    • http://mejitakofiragi.epizy.com/tusijajubuwuvulap.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/jakidi.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/bajofemadi.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/teri_call_video.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_off0000ce44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE44 5068 bytes
SHA-256: abbc0a28a1f02027fb38ebbf4c13e936520d7374173af7f52e2a3a4d3d99c20b
font_01_sfnt_off0000df93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF93 10396 bytes
SHA-256: cd87f6de4410a860158f87f2945eed600d58be8e0866541114cb64fc080e8e2d