Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d644ce12e4f66cc…

MALICIOUS

PDF

78.6 KB Created: 2021-02-19 07:23:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9fb73a8fc21a8772fd17ab2bdf61ff26 SHA-1: f00be3b5b8b29bb78bfce38387cff4b2965fea41 SHA-256: 5d644ce12e4f66ccddda9792fd8cb7c658269cdc6c3d7a6271c29f0b8c7ae5c8
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=the+wealth+inequality+reader+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445739/normal_5fd0a9a585345.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410722/normal_5ffd0df0a2e6f.pdfIn PDF document text
    • https://xugoxokolo.weebly.com/uploads/1/3/5/3/135392162/kejizoziv.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/bHhadTM/billie_eilish_everything_no_time_to_die_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489050/normal_5fe486495f571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483833/normal_5fdc33b3dd5bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388820/normal_5fed7ef5d23fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448137/normal_5fcc725c9a7a5.pdfIn PDF document text
    • http://retapobu.iblogger.org/age_of_empire_3_mac.pdfIn PDF document text
    • http://ladidoxa.iblogger.org/kojexomodu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gonuwufif.epizy.com/gapizirijodepipinarilamu.pdfIn PDF document text
    • http://mejesikuwuvaxax.rf.gd/bib._dll_file.pdfIn PDF document text
    • http://butadiviwev.rf.gd/neurological_examination_ppt_free.pdfIn PDF document text
    • http://varunogozanog.rf.gd/loch_lomond_walking_guide.pdfIn PDF document text
    • http://xuxirifuv.rf.gd/33930997892.pdfIn PDF document text
    • http://balepififeri.rf.gd/adventure_capitalist_mod_apk.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_off0000f531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF531 5220 bytes
SHA-256: c529033fb6feb9de716b36a9809262656ff2cd7972116473286bc50615a125fd
font_01_sfnt_off00010702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10702 11276 bytes
SHA-256: 922573ac683b40e25c2fa69b8943d65c4905de5ec98ebbe5f6420140044e809e

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