Malicious PDF — malware analysis report

Static analysis result for SHA-256 f35d4090274d07cb…

MALICIOUS

PDF

67.4 KB Created: 2021-02-16 08:54:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 9d233767f059aaadffad4c280190b3a1 SHA-1: dafa22ef763ff2b5e53774e929fd92191dfafd91 SHA-256: f35d4090274d07cbff3396780f95a398e753df8b1c38498e9b53f523c32a9b2c
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=getjar+gold+apk+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387814/normal_6021ab3e4d49f.pdfIn PDF document text
    • https://mobisikude.weebly.com/uploads/1/3/1/6/131606420/lexenudunodo.pdfIn PDF document text
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/0dd09.pdfIn PDF document text
    • http://kismykeitio.best/cessna_421b_maintenance_manualh31ib.pdfIn PDF document text
    • https://dijibelusubif.weebly.com/uploads/1/3/4/8/134871127/balifimiwumimubegeb.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/mugavor_fopopasexipogi_xukosos.pdfIn PDF document text
    • http://probnik1313.tech/69109014805tppuo.pdfIn PDF document text
    • http://trastqort.online/tabotaxovmxhl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385424/normal_602b54da45c3e.pdfIn PDF document text
    • http://comp-arenda.site/gotamabusaz6oh10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488809/normal_601c64e8ce3cf.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/welanisowari/60970856454.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/59049102506.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/24098926432.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/15262198216.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_off0000cb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB15 5212 bytes
SHA-256: 4eb691a0b7f6670f2753a7fe80f4a6832297d1e2c3eb04318254a8154d15cc55
font_01_sfnt_off0000dcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFB 10456 bytes
SHA-256: adef2e9e200d3f82cfa46bed8ca33f70426f19604dac3d8b1b037ccafe225a0c