Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc142994202ba8a…

MALICIOUS

PDF

78.8 KB Created: 2021-02-05 06:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 43aec74140f9976c7ca196ddddf4c9dc SHA-1: 25360895a02746f5bfe47f9a43f15a06ec508c26 SHA-256: 7cc142994202ba8a3800961b89b13e2942636a413cc49e8b06c790be0a11169e
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, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' indicating a large number of outbound links. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics point towards an attack pattern involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/aws?utm_term=rcog+guidelines+for+puberty+menorrhagia PDF link annotation
    • http://wajobok.iblogger.org/how_to_answer_willingness_to_relocate.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463825/normal_5ff15b46a91e3.pdfIn PDF document text
    • https://bitigufej.weebly.com/uploads/1/3/5/3/135337089/zawibezada.pdfIn PDF document text
    • http://pepirizibizedel.22web.org/free_cursive_alphabet_practice_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/mLjbz0p/car_driving_school_simulator_download_pc_free.pdfIn PDF document text
    • http://patewukezevo.iblogger.org/daughter_of_invention_answers_key_commonlit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_601a666386344.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449793/normal_5fc8bb63cc132.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rotalewisiv.epizy.com/gloomhaven_classes_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/nasosiwukuso.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/bodoni_mt_poster_compressed_font.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/bajirao_mastani_tamil_movie_tamilrockers_hd.pdfIn PDF document text
    • http://zerekigukazaja.epizy.com/49870225307.pdfIn PDF document text
    • http://badokelo.rf.gd/79264228511.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/karojasun.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/training_coordinator_cv_template.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF479 5816 bytes
SHA-256: 341ac00b0677e40671140808ba5d988fb354c607455a7714e5b756b211701a7f
font_01_sfnt_off00010823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10823 11108 bytes
SHA-256: 6aec5be66943a1188d78f0a3cff6b5966af5d3ec9779d1cc3b16b5528b724ad8

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