Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe92375c402411ec…

MALICIOUS

PDF

75.8 KB Created: 2021-03-30 11:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 918454e9970a0b970b87c902916709c4 SHA-1: e95a9844efe4d7112bca0b28ffd2ed8e40b83ea1 SHA-256: fe92375c402411ec202c3f763376f42e7d37dbb447f7b19af7b45289e81a61af
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains numerous external links, with a primary focus on directing users to `https://golowaki.ru/123?utm_term=bekaboo+season+1+free`. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to redirect users to potentially harmful content, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://golowaki.ru/123?utm_term=bekaboo+season+1+free PDF link annotation
    • https://foxetevuleludo.weebly.com/uploads/1/3/4/8/134859937/pemobiwofedubal.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/mofanalijabiwino.pdfIn PDF document text
    • http://bossyonlinex.com/soleus_air_portable_air_conditioner_with_heat149b6.pdfIn PDF document text
    • http://tijudiwulewanuw.getenjoyment.net/fender_hot_rod_deluxe_30_watt.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/56020744370.pdfIn PDF document text
    • http://zanapipok.getenjoyment.net/basic_english_grammar_quiz.pdfIn PDF document text
    • https://gusoretudofuriv.weebly.com/uploads/1/3/4/8/134885571/liraji.pdfIn PDF document text
    • http://3-bureaureport.info/40167225702irfm4.pdfIn PDF document text
    • http://carbackseat.site/mares_puck_pro_o_cressi_leonardoiahcg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1a84409-2456-41a6-bd9f-92b3c616bb8c/14494778961.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/2197317895.pdfIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/11114078992.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/prophylactic_antibiotics_for_dental_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/bracket_no_time_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ec008e-e0a1-40da-a194-83c2f0d274bb/7.3_powerstroke_engine_schematic.pdfIn PDF document text
    • http://sawesupunozigiv.atwebpages.com/37488297903.pdfIn PDF document text
    • http://zivexotafoni.myartsonline.com/espresso_english_phrasal_verbs.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/78102171756.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/yaesu_ftm-100dr_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6326f2a2-f8dc-4f72-8f55-22d0636dea81/acer_aspire_es_15_windows_10_recovery.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_off0000ebaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAA 5032 bytes
SHA-256: 61128b832870754cc73eb7c19c0b62698333ee2a415bb2524f9a6e87b519b5eb
font_01_sfnt_off0000fce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE9 11000 bytes
SHA-256: c19a0ea84ae9d051eb157e180ac9edc0825164fc8ce834e880fcdf700c247f97

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