Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e894b96a009b54e…

MALICIOUS

PDF

85.9 KB Created: 2021-09-20 19:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a4a9030c5c93e10fe86a8791f961a97b SHA-1: 647aeafb3d4b87fa8a6318c93bb435ee4f55297b SHA-256: 9e894b96a009b54e9fee41522a7754f438ba1f40fd0c868e66144f11ad0ab601
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users. One URL, http://ingmarcofaedi.com/userfiles/files/6789978810.pdf, is particularly suspicious and likely serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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 http://ingmarcofaedi.com/userfiles/files/6789978810.pdf In PDF document text
    • http://baracenter.be/userfiles/file/goselewizemoxanalabuv.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161306638f0a54---50119588390.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/51413627248.pdfIn PDF document text
    • http://nktrading.qa/file/files/sopugimikufikis.pdfIn PDF document text
    • https://huanghecables.com/d/files/vonowaborupodupoxe.pdfIn PDF document text
    • http://shanghaicruiseparty.com/uploads/file/99994162471.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/32897471915.pdfIn PDF document text
    • https://kysig.com/app/webroot/userfiles/files/zaxoru.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/lonitamimarigiwelulokeb.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/vabovamelolasadokikile.pdfIn PDF document text
    • http://maytinhnangdong.com/files/uploads/editor/files/62607105713.pdfIn PDF document text
    • https://fpcofmacon.com/nbloom/fckuploads/file/tinugozekotosewetubaxirez.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/wonutejefuwugite.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/pufaruvovisadi.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/lozuxuxizode.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/72145264988.pdfIn PDF document text
    • http://eubeer.vn/uploads/files/xakegobedamodeb.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/161427c6bbdd33---29462278528.pdfIn PDF document text
    • https://greenways.at/userfiles/file/59112664535.pdfIn PDF document text
    • http://kp-technik.cz/ckfinder/userfiles/files/83865418126.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210905013157.pdfIn PDF document text
    • http://inoxbienhoa.com/upload/files/93120040370.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/dokumonew.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/musofadawo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=lantern+verbal+reasoning+answers+for+primary+4PDF link annotation
    • 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_off0000e75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75E 11140 bytes
SHA-256: 13229a1e1bbf1a16137219fef496e3b03eb846abaa52304503f8f8b06192ee22
font_01_sfnt_off0001014c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014C 18428 bytes
SHA-256: 80aaedeff454b9b6bd6e6753cc6380c1c99588635f357483d9af0d940a668579
font_02_sfnt_off0001312b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1312B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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