Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd0e421eb59d252…

MALICIOUS

PDF

83.6 KB Created: 2021-02-19 20:49:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 86f8ea3971657cbd33e9089447f8144a SHA-1: 9cff0de256bb2b3148f16980aec53db4943895d4 SHA-256: 3cd0e421eb59d2524bfdf48e34fc32e08ea34ae40acf33ba60240069b90c9eae
194 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to obscure malicious destinations. The presence of a 'download button' lure and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or malware distribution attempt. The ML classifier's high score further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • 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://bologen.ru/strik?utm_term=hp+photosmart+plus+all-in-one+printer+-+b209a+driver+download PDF link annotation
    • https://dururamud.weebly.com/uploads/1/3/4/8/134846475/cc928.pdfIn PDF document text
    • https://fixajunize.weebly.com/uploads/1/3/6/0/136051507/5cf4dd.pdfIn PDF document text
    • https://bawovaleza.weebly.com/uploads/1/3/2/6/132683088/kasoxasum.pdfIn PDF document text
    • http://meetly.space/jojowetagogoreledazebuzervc5f.pdfIn PDF document text
    • http://idealicaufficiale.website/living_air_purifier_xl15_manualgtfii.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/69027410280ruyc.pdfIn PDF document text
    • https://kifeketefisub.weebly.com/uploads/1/3/5/3/135347095/sesumejetonagez.pdfIn PDF document text
    • https://ligotilup.weebly.com/uploads/1/3/4/3/134313371/3722381.pdfIn PDF document text
    • http://frankiearvelo.com/1236996493pn8tr.pdfIn PDF document text
    • http://kupivse.xyz/xivubosunagixaretencxvjl.pdfIn PDF document text
    • http://llloooodddd.space/decolonising_the_mind_questions_and_answerswlyp3.pdfIn PDF document text
    • http://requiremcgood.com/rocketbook_review_ukr6wcv.pdfIn PDF document text
    • http://fruits-summer.fun/57624155694i0mol.pdfIn PDF document text
    • https://duzetokip.weebly.com/uploads/1/3/4/4/134404829/vebuxumetotob.pdfIn PDF document text
    • http://shothard.site/sinatumivetinogodefud3h7lv.pdfIn PDF document text
    • http://neyroskakalka.site/aldi_talk_app_mactabz6.pdfIn PDF document text
    • http://helpcopyright-service.com/bitdefender_android_antivirus_reviewtqzg5.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/fititulo_pegimedololuna_godajeki.pdfIn PDF document text
    • http://bonifacy.site/89363108477nqavc.pdfIn PDF document text
    • https://biwasigefo.weebly.com/uploads/1/3/1/3/131398444/e9b763f7fb6c201.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
    • http://fikojopetomex.rf.gd/best_hd_wallpapers.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_off0000faaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAF 5796 bytes
SHA-256: 726347dd5a7237b3f39c3422ee2e9e330612baa09513f01b00508f5f8774b7e2
font_01_sfnt_off00010e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3F 10384 bytes
SHA-256: 22e0326711ea1e6e6f993ad6d4f77c269edec77453f22324620164da9d402fbf
font_02_sfnt_off000131ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c