Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c09f978faa1cb7…

MALICIOUS

PDF

84.1 KB Created: 2021-04-18 08:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e095bd5465ba348cc8166482c22020e0 SHA-1: 6c7aa654d550c665e801369dada7a8ce5ecfc705 SHA-256: b7c09f978faa1cb75acdba2656f79a3a40f8b53b2d85724b19978fc3bc8f1ec0
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing or link farm attack. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to potentially harmful content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate a deliberate effort to create a network of links, likely for malicious purposes such as distributing further malware or conducting phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/strik?utm_term=huckleberry+finn+banned+book+reasons PDF link annotation
    • https://pevumufaropis.weebly.com/uploads/1/3/4/7/134706438/penotolan_kujibone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413719/normal_605f88df1d9b0.pdfIn PDF document text
    • https://sazalilo.weebly.com/uploads/1/3/4/5/134592982/gosifanuza.pdfIn PDF document text
    • http://select-get.top/scholars_pack_or_explorers_pack7n7yy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384642/normal_5fc8311b88328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_6018c46bd7882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468836/normal_6026b944be107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_604515214ab82.pdfIn PDF document text
    • http://sochi2026.com/what_foods_can_you_eat_on_the_wild_rose_detoxgzbd4.pdfIn PDF document text
    • http://texoraw.sportsontheweb.net/analise_combinatoria_resumo.pdfIn PDF document text
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/xewalora_donog_redutidiraju_titumamerakode.pdfIn PDF document text
    • https://bukodebavuv.weebly.com/uploads/1/3/4/6/134657655/85ce9d55ab82a2.pdfIn PDF document text
    • http://smotrikino.fun/busiwibimakanawekimakok03b.pdfIn PDF document text
    • https://jejusutib.weebly.com/uploads/1/3/0/7/130740078/sonutovaxilupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408195/normal_601fd4e4ebed8.pdfIn PDF document text
    • http://dikegebe.mygamesonline.org/this_is_where_the_world_ends_sparknotes.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://filanion.online/abecedario_para_colorear_mayusculas_y_minusculaszwo1x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491445/normal_605aa272b44e3.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
    • https://uploads.strikinglycdn.com/files/92259e7f-7d2e-42fe-978d-81300b10a843/panasonic_cf-53_driver_package.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbfa78de-2989-433a-8185-8226735dffed/zamovoziwewoxewoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6084f5eb-99fa-4a4a-bec5-0d4761365b9e/52696362912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d8c27c-c43c-47d5-b473-a25004fea18b/write_a_paragraph_about_food_in_iran.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_off0000ff83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 5084 bytes
SHA-256: 937d032c296c5ad8345a704b09d0a23f5278edfbd489b903ddb4650d80aeff89
font_01_sfnt_off000110d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D2 10520 bytes
SHA-256: acb2b82ffb11e571957f5d46e33b8f63520d5b62b8ce7d700c98e3de9f0c9a64
font_02_sfnt_off000134c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176