Malicious PDF — malware analysis report

Static analysis result for SHA-256 5219a5a455ba9b1f…

MALICIOUS

PDF

77.9 KB Created: 2021-04-26 21:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 668884d30cf91e37b3e9375fbc96b15e SHA-1: 174863d2f624aaccebc5a214da7ffb7215f3853c SHA-256: 5219a5a455ba9b1f306590f1140561d17e0eeafcab567007ab1a5db77e5c3cc4
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classified as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the presence of numerous external URLs points towards an attempt to redirect the user to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=treadmill+sole+f80+review
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/xojodatefidikix.pdf
    • https://babujotiju.weebly.com/uploads/1/3/4/7/134751526/3c1f45c2cf0.pdf
    • http://gixipures.sportsontheweb.net/vudebe.pdf
    • https://cdn-cms.f-static.net/uploads/4417815/normal_606a7199c6f78.pdf
    • http://kifejuja.medianewsonline.com/52097411351.pdf
    • https://livaruzurakit.weebly.com/uploads/1/3/4/4/134432061/jokodipinejuzalebev.pdf
    • https://xezujexowesujol.weebly.com/uploads/1/3/4/5/134502134/cb80403a095.pdf
    • https://cdn-cms.f-static.net/uploads/4385424/normal_603bfa84c0e11.pdf
    • https://cdn-cms.f-static.net/uploads/4369306/normal_606e61719daa7.pdf
    • https://tatidadimu.weebly.com/uploads/1/3/5/3/135383915/4469020.pdf
    • https://static.s123-cdn-static.com/uploads/4459166/normal_5fcbe0656f0cb.pdf
    • https://kevefizi.weebly.com/uploads/1/3/1/8/131871405/027161a6058.pdf
    • http://kebenoda.scienceontheweb.net/developing_skills_for_the_toeic_test_bn_p.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sugamane.onlinewebshop.net/daxofusabovenumofobu.pdf
    • https://s3.amazonaws.com/mixanaz/51322068530.pdf
    • https://s3.amazonaws.com/purufiz/miverizagafotoguda.pdf
    • http://pawuzax.onlinewebshop.net/zowuvowonutagixaxulu.pdf
    • https://s3.amazonaws.com/zafijukopa/hp_officejet_7510_printhead_price.pdf
    • https://s3.amazonaws.com/wemazun/53746693130.pdf
    • https://s3.amazonaws.com/nalifij/gate_2018_instrumentation_books_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f00a.bin
a2a9f64491a88094b2305add5118ef55cb04ade09cf674b200e2a7fb7e415b80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF00A 5488 bytes
font_01_sfnt_off000102ae.bin
12c12e9e342700febb0ea95917f0a19cdb3c14a4b5ea5a822bac0cfa45e4906c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102AE 12112 bytes

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