Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc78dad90da2afa…

MALICIOUS

PDF

69.8 KB Created: 2021-02-11 15:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f12224cfd6336c6f6d0577f320607721 SHA-1: d3b63975fb9a7d94497a162c964f658558983250 SHA-256: 3fc78dad90da2afa7e3482eedb25e3c1f25553ce0d2ee6d449619da8ce1ddd7b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wb?keyword=starbucks%20uk%20jobs%20application%20form PDF link annotation
    • http://futupuj.22web.org/imperative_in_english.pdfIn PDF document text
    • https://dimulawi.weebly.com/uploads/1/3/4/3/134380670/d937e6e.pdfIn PDF document text
    • https://vovasodakujex.weebly.com/uploads/1/3/0/8/130874601/bisifovoraxuvigogeb.pdfIn PDF document text
    • https://gefobivuvevu.weebly.com/uploads/1/3/1/3/131380717/xarudugunopix_rikosimugilimo_jozene_zobuwibixarobo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nanamiw.epizy.com/64697621052.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/zetenudojas.pdfIn PDF document text
    • http://jerovesunok.epizy.com/40054255738.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/pigixo.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/xojumetofekoxerarabuluxu.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/the_atomic_weight_of_chlorine_is_reported.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/test_case_estimation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/towalodapiga.pdfIn PDF document text
    • http://xutuvom.rf.gd/adjustment_letter_sample.pdfIn PDF document text
    • http://lexaxixamu.rf.gd/spider_man_games_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/alcatel_one_touch_pop_c3_firmware.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_off0000d289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD289 5544 bytes
SHA-256: de2dc94fd88c76f191b7e04c3902d0129f7cb1e4e366fc3a01573720a9d92eb6
font_01_sfnt_off0000e557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE557 10876 bytes
SHA-256: 490adf3d298609d8ec6b54f02941362063e70fd2b439c54dad5e413dc1a4ecc4