Malicious PDF — malware analysis report

Static analysis result for SHA-256 c565610994e2e105…

MALICIOUS

PDF

77.6 KB Created: 2021-02-12 03:15:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: b6bf830395e6f6e9d8a8fb552d4942bf SHA-1: 7255377f3e1d09b2b6d10a34e14f3be885dc85e1 SHA-256: c565610994e2e105776f2482f0c58ce0b8ef47a81f353e5c75571273fab200f6
126 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a large number of links on low-reputation hosting, a common tactic for distributing malicious content or conducting phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=sugarloaf+mountain+florida+address PDF link annotation
    • http://icub.tech/31772414566guglp.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/honne_day_1_sheet_musicydyv7.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/qjejj5S/definition_of_occupation_within_occupational_therapy.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/chdPYEL/a_tag_knight_mod_apk.pdfIn PDF document text
    • https://jipofaxinevafud.weebly.com/uploads/1/3/4/3/134350183/54ab8ddb9ed.pdfIn PDF document text
    • https://sufudavinor.weebly.com/uploads/1/3/1/3/131381021/kimididafibebemixuf.pdfIn PDF document text
    • https://cdn.sqhk.co/risenulowo/cEovKvl/34589353668.pdfIn PDF document text
    • https://wegedojilo.weebly.com/uploads/1/3/1/3/131398291/9522694.pdfIn PDF document text
    • https://xaxarudo.weebly.com/uploads/1/3/0/7/130740130/54a7d.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/Hggtiij/xapetazafomitaxomujujedov.pdfIn PDF document text
    • http://lg-supportteam.com/most_viewed_viral_video_2019lcoon.pdfIn PDF document text
    • https://lokudepapina.weebly.com/uploads/1/3/5/3/135325929/9234346.pdfIn PDF document text
    • http://forecast.bet/894998065674vvu9.pdfIn PDF document text
    • http://zodezabazigojab.iblogger.org/insert_into_oracle_date_format.pdfIn PDF document text
    • http://visionnew.xyz/xexewaxidudiwuxolajulidubhpvok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gonoluripep.rf.gd/dejakefekutumixoze.pdfIn PDF document text
    • http://powipuwefitori.rf.gd/whatsapp_app_apk_uptodown.pdfIn PDF document text
    • http://mofagadelebedos.rf.gd/27447340653.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E8 5212 bytes
SHA-256: 78e859cf6ecd2c0cd652f1d4fa45f3c7d1470bab167f6e87c2c5e133e760dfc0
font_01_sfnt_off0000f880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF880 10080 bytes
SHA-256: c04f9309c7ad7ccd3db452310b059703ed63c979dbb02e774f3aac1057fec817
font_02_sfnt_off00011b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B12 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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