Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f29574d369c83d…

MALICIOUS

PDF

77.3 KB Created: 2021-03-19 05:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 82698136e36660a3ae781878a162bc0a SHA-1: 7ea32ccd6235f7a0a0bb2e975949603084cd8c68 SHA-256: c2f29574d369c83d99700e5b1331494070b2162e9ef6107cedbe23074996acfc
186 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as a link farm, containing a large number of external links, many hosted on disposable domains. The ML classifier and ClamAV also identified it as malicious, specifically a phishing or trojan. While no scripts were extracted, the primary attack pattern involves luring users through these links, likely to a phishing site or for further malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/strik?utm_term=epson+xp-800+fax+setup PDF link annotation
    • http://muzolifuvekimew.22web.org/honeywell_quietset_whole_room_tower_fan_-_black_hyf290b.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/HiiyhcB/zombie_simulator_z_premium.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468823/normal_602a0f30dd58f.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/jRC4jjd/78563007436.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/er12508/tiwubaweromebasi.pdfIn PDF document text
    • https://cdn.sqhk.co/xaloxezajaga/FhgQAGJ/8_ball_pool_app_download_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393035/normal_5fe02ca9210d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413865/normal_5ff4cefb13c66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_603b45800a288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445754/normal_602b0383e8409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449411/normal_5febbe023a430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424645/normal_601f2e0f0bdbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428341/normal_60533eb60a6ce.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/4lTVqiU/lijepedunitufalagovi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wexapunotuvegu.rf.gd/satarudodat.pdfIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_3287420b044147598edf83bcacf85744.pdf?index=trueIn PDF document text
    • http://gezixerigalejeb.rf.gd/sulumebuzoxabepakof.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_8a1b212e03d54d3fb08e4694268293b7.pdf?index=trueIn PDF document text
    • https://814bd5e1-0b6f-40f8-b2e9-6ab0015c5eef.filesusr.com/ugd/cc77ff_ea634314a566493ebbf4affc26473482.pdf?index=trueIn PDF document text
    • http://majilutiwuxas.rf.gd/janolujenivowaniworepo.pdfIn PDF document text
    • http://xarirog.rf.gd/67799018832.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_off0000f01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01C 5160 bytes
SHA-256: 7936a771e1e711112cda3c4ce1f2c7c340c5e7f090f3ad6722524826425ab26a
font_01_sfnt_off000101d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D6 11116 bytes
SHA-256: 037d1dc08d45975f7a84e9dbbf2602630cd4cd5d6882bf111911d748b6d0f5dd

Open this report in the interactive analyzer, or submit your own file for analysis.