Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec1f006e47ee5c01…

MALICIOUS

PDF

77.1 KB Created: 2021-03-29 10:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a0aee98e084b8d14f63699192a673f0 SHA-1: 274d751acf4d158b4f1b443d438d3b22754d5254 SHA-256: ec1f006e47ee5c0100d5de6844fb0bc775a694e7fec228a070bf62ff22c23b83
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, forming a link farm, with the primary suspicious URL being https://xezojetit.ru/strik?utm_term=burger+king+coupons+2021+pdf. The document body, though partially corrupted, suggests a lure related to 'Burger King coupons 2021 pdf', likely intended to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=burger+king+coupons+2021+pdf
    • http://xoziduso.mypressonline.com/wadobixibulajijevozit.pdf
    • https://fikakexuk.weebly.com/uploads/1/3/0/7/130775276/numinadetive.pdf
    • http://bogipeborowe.sportsontheweb.net/esl_library_conditional_sentences_first_conditional_answers.pdf
    • https://wawogikaso.weebly.com/uploads/1/3/4/7/134726687/widemirozol.pdf
    • http://nususolajegak.iblogger.org/nys_defensive_driving_course_answers.pdf
    • https://zibekasosux.weebly.com/uploads/1/3/4/0/134040395/zaden.pdf
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/1815306.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_b72016f3164a46c0bf1a999b240b3b0d.pdf?index=true
    • http://xamukipadu.myartsonline.com/kaufland_katalog.pdf
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_bda0dab287d742e3aa7e8c68b505cf05.pdf?index=true
    • http://lejonawazemu.rf.gd/73559252270.pdf
    • https://s3.amazonaws.com/mefadedosuw/jelefukirarogukavu.pdf
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_964e9e91671c4fa8bd004b86a21a9c7a.pdf?index=true
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_826d0f75507242eb8678cd6dfbf7be66.pdf?index=true
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_aaf94e1b5701490b975c2d081c254ab6.pdf?index=true
    • https://s3.amazonaws.com/donukadizolin/petebumetasa.pdf
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_24cb61f1b11b46f88b5ecfcd9a8be512.pdf?index=true
    • https://981168d4-05fc-44b6-871d-73371d7e8cf1.filesusr.com/ugd/87d215_7a34ec2ffa1d460cb7f94a00724a81d8.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de0b.bin
6ad6e014caf353434f33a43dd9c3e9152cdfdc79f8e02c3b5440d3bfded4372a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0B 5320 bytes
font_01_sfnt_off0000f03d.bin
5295160721c2acf021c9402c03e6c5c80fe3c6d7c43b5676ee1237f6b100f17e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF03D 11788 bytes
font_02_sfnt_off000117eb.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117EB 4324 bytes

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