Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cfbeeaf90602259…

MALICIOUS

PDF

68.8 KB Created: 2021-03-22 21:48:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6d8f9ce21a36a5ae166f61b34ecba2bb SHA-1: 553a7025b364e7ac9805a77fdfc15f00d05ee20f SHA-256: 2cfbeeaf90602259705cf1a09dad3eb195c238b45e4597bc7e93267eea2356db
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which are likely part of an SEO spam or phishing campaign, directing users to potentially harmful websites. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document's primary purpose is to drive traffic to external sites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://vilenefex.ru/award?keyword=biblia+latinoamericana+para+formadores+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376362/normal_600d371ec993c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478670/normal_5fcf4346a2cbf.pdfIn PDF document text
    • https://wofudanizosaxig.weebly.com/uploads/1/3/1/6/131637209/numimalofozabutat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413244/normal_603c46987ac05.pdfIn PDF document text
    • https://neletataw.weebly.com/uploads/1/3/1/3/131398134/98e9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366630/normal_6007234325665.pdfIn PDF document text
    • https://vafevovelawa.weebly.com/uploads/1/3/1/4/131407112/06e5f10b5.pdfIn PDF document text
    • https://welusagosa.weebly.com/uploads/1/3/4/3/134355806/7220297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454286/normal_602ea87dae4ff.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/furunumaroxun/xekusibetuki.pdfIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_ed620f4656504f64ad53944646f03cf0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/59643517985.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/tusanikoburukovajuda.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/append_data_in_formdata_jquery.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/the_hidden_oracle_book_online.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/meme_music_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a95c6c5-93e9-4869-a2f5-28494ca5e3b6/how_do_i_contact_canadian_customs_about_a_package.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32a6689e-669a-42a4-abd0-7ff3c0d903fa/dodimobusaja.pdfIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_9e3786094e784694a1df04eb14570118.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/solonebosop/992979494.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/yearnings_of_the_wind_piano_sheet_music.pdfIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_f81697a0bec046abaf2a4d743e4ea9ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba425cd7-5800-4cf5-b1ca-66645d398de8/53150373041.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/lejajegifuzegovaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/are_poker_tournaments_worth_it.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_off0000cde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE2 5492 bytes
SHA-256: 7c18a46b1317d2c3c472e1480f0fb72f91304c1ece2e3c30e64fd0ee5fafc50f
font_01_sfnt_off0000e071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE071 10828 bytes
SHA-256: a311ba4dbff8f0b419ae7f08b17151102385010671b22ea3a3df9faddca322f3

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