Malicious PDF — malware analysis report

Static analysis result for SHA-256 a753564ef118f700…

MALICIOUS

PDF

67.1 KB Created: 2021-09-27 11:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 29009b2eefbb84b1b7e8fd119c8f1346 SHA-1: c60b19a73693b8721eb89893a4e9572eddfba878 SHA-256: a753564ef118f70058d53f427e99fc69e4d69a605a10ab3190b3b926c4bd7737
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as a phishing lure due to its image-only nature and embedded clickable link. The heuristic PDF_IMAGE_LURE indicates it's designed to trick users into clicking, likely leading to a malicious site or download. The presence of numerous external URIs, many hosted on disposable domains, further supports a phishing or malware distribution campaign. No scripts were extracted, but the overall structure and embedded URLs strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://allytemp.ru/uplcv?utm_term=root+apk+free+download PDF link annotation
    • http://galerie45.com/userfiles/file/zagugikoxugajuzu.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/zimanixor.pdfIn PDF document text
    • http://zhihepvb.com/upload/ckimg/files/202109050011515918.pdfIn PDF document text
    • https://hotlinepro.in/admin/userfiles/file/1478895347.pdfIn PDF document text
    • http://aatmicscience.org/asuserfiles/file/kikexuxafaton.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/dipumutefeduwigewivi.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/gatolesixizejafun.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/80558523058.pdfIn PDF document text
    • http://mopron.ru/upload/files/22841525366.pdfIn PDF document text
    • http://fulns.com/uploadfile/fckedit/file/1631737627CQAY.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/xitobepet.pdfIn PDF document text
    • https://onderhoudnlgarantie.nl/upload/file/57733663903.pdfIn PDF document text
    • http://apex-architect.ru/images/file/fewadobogekedafatiburu.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/85321049404.pdfIn PDF document text
    • https://avistravel.activsport.ro/userfiles/file/30271089657.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/gavugigisaparesavolep.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/71496285479.pdfIn PDF document text
    • https://educhina.mn/editor/files/kuzomaxatewakon.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/41299028718.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/83609719070.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB28 14512 bytes
SHA-256: b644036ba1c8f3e37865f668a462d6b968608842a774a2ef4536d057b89c5929
font_01_sfnt_off0000cfaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAF 10452 bytes
SHA-256: 1eb5176e42563b2d1122dec16866e8397bfc925d2417f66a6b0209316df78b2b
font_02_sfnt_off0000e7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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