Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68b4bba132122e2…

MALICIOUS

PDF

71.9 KB Created: 2020-12-24 20:07:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5f9cf0cd6a61f9329c80bcffdfc8376a SHA-1: e63362e20d6baee363532439647352a783f6df30 SHA-256: f68b4bba132122e2c4d3594dbf2b03bf64315a0ccf97218431a34d6c157e8a92
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, indicative of a link farm or phishing attempt, with one URL specifically mentioning 'pudding pudding jelly mask sheet cacao' as a search term. ClamAV and ML classifiers strongly indicate maliciousness, flagging it as 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document's primary purpose is to redirect users to potentially malicious sites, likely for phishing or scamming purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffnew.ru/aws?utm_term=pudding+pudding+jelly+mask+sheet+cacao PDF link annotation
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/vakuxadixilux.pdfIn PDF document text
    • https://cdn.sqhk.co/xevuvuxene/hjjihCq/f4_phantom_jet_model.pdfIn PDF document text
    • https://pekesasopalono.weebly.com/uploads/1/3/4/5/134505129/xoxokofifilun.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabumumiw/oqic0F2/liguxexavopap.pdfIn PDF document text
    • https://cdn.sqhk.co/rosafipex/gbvidha/11981850991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472182/normal_5fa6f8c2d1305.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380405/normal_5fcedb3f316b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kaxukok/serorukotiroxe.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/zobakasil.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/can_t_activate_pluto_tv_on_on_roku_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/answering_the_call_candidacy_guidebook.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/jowuwuzomaregi.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_off0000ccc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC6 2856 bytes
SHA-256: ede077bcf9d936b2deabd1ca36e5cf164b77d75f1467ec74ab7a8d43bb048d6a
font_01_sfnt_off0000d6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F1 5636 bytes
SHA-256: a005d133195d2edeb7ba680936f886b3599d4d8b05e90b35d930525140ddccff
font_02_sfnt_off0000ea0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0A 13460 bytes
SHA-256: 98d00e903891d3bbc10a96bd3431d69e76f78dcd4f41d24803c918fcff71464f

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