Malicious PDF — malware analysis report

Static analysis result for SHA-256 c68ca1027ab1ddb4…

MALICIOUS

PDF

76.4 KB Created: 2021-03-20 16:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 27197599c73abc962757d2a54582fa07 SHA-1: d8e9e707a95e07c65423fe24edb0785606a64e04 SHA-256: c68ca1027ab1ddb42b22a4086f39658af17d068f2d35999d629d7445a2087eba
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many of which are hosted on disposable domains or are part of a link farm, suggesting an attempt to direct users to malicious websites. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs indicate a phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://midufefew.ru/aws?utm_term=d%2526d+5e+player%2527s+handbook+2+pdf+free PDF link annotation
    • https://cdn.sqhk.co/baxikomo/bS1iiji/87116577438.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370561/normal_6025971996c9e.pdfIn PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/d34aa30.pdfIn PDF document text
    • https://jolewewovu.weebly.com/uploads/1/3/6/0/136087062/3213575.pdfIn PDF document text
    • https://cdn.sqhk.co/dovoxukeni/Igjgigi/kawekomamini.pdfIn PDF document text
    • https://boxagabopevonud.weebly.com/uploads/1/3/4/3/134353696/lugidaxevoxo_xovemeleva_sazodupaw.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/hhijhic/53024928039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471250/normal_601b377b0cd14.pdfIn PDF document text
    • https://cdn.sqhk.co/tokotuxajif/uf8jgzG/82613689618.pdfIn PDF document text
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/xagow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_6032939c22eb8.pdfIn PDF document text
    • http://vurujupafowutox.mypressonline.com/95373573431.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/susaludilofo.pdfIn PDF document text
    • https://nebobaxewakizix.weebly.com/uploads/1/3/1/6/131637309/4227589.pdfIn PDF document text
    • https://cdn.sqhk.co/vemonososepa/ROyEwhV/hot_springs_story_apk_2._3._9_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://da54c32a-99c7-4590-8520-800dd2d1cae3.filesusr.com/ugd/7973d2_caf9faf30f544b348224cb6a4778b6c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/82416301833.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/85287787497.pdfIn PDF document text
    • https://18d8f76e-0bdd-4b96-b744-fee987eed1b0.filesusr.com/ugd/1486c8_92a40379c66e4477b537661ba4073ddf.pdf?index=trueIn PDF document text
    • http://zirutabu.myartsonline.com/car_magazine_south_africa_download.pdfIn PDF document text
    • http://rixuroruwe.myartsonline.com/properties_of_alloy_steel.pdfIn PDF document text
    • https://869e45c2-9c2d-410b-ad52-4d3411d41339.filesusr.com/ugd/73bd41_18bcd72474934767899104fa5f18437f.pdf?index=trueIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_3a463825251547b689fa165cda052f55.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefodek/54823128976.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/pejipo.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_off0000f1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CD 4156 bytes
SHA-256: bae8c65fbb2985f8f9e3f3f2bcf16a0f9e8e1e4a7d5ebf1135d71e3fbc9ddb2e
font_01_sfnt_off0000fffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFB 10644 bytes
SHA-256: f8eb765babfcefb11e925fb360fa0f076b83c26057d1186e322f49f9d5d0d7dd