Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d31126e1561f08…

MALICIOUS

PDF

84.2 KB Created: 2021-09-06 16:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9fb82ac39bd6c55abdaa2b7369a1435a SHA-1: d6a65feaa7833d65bf1c8738de7cbd2f72d91ea3 SHA-256: 49d31126e1561f08d1cf820ac4ed471c55677e32e88bd9fb5c879285af371540
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites and exhibiting link farm characteristics, suggesting an attempt to distribute further malicious content or phish for credentials. The presence of external URIs and link farms indicates a likely spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab09be15584---89938164327.pdf
    • http://pomodorolennep.de/gfx/userfiles/files/mukugozijaziwavofitegor.pdf
    • http://nousgarage.com/userfiles/file/mapikaxekudibezaluji.pdf
    • http://www.impactit.in/ckfinder/userfiles/files/pupusigikunej.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed482a4da2---mutolafexozefovexegan.pdf
    • http://yossy.biz/userfiles/file/36459425285.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dd9321c0b22---gedaxijovumifeped.pdf
    • http://www.findvoters.com/userfiles/file/42809660692.pdf
    • https://amrapalispot.com/userfiles/file/68728160885.pdf
    • http://mdsalon.ru/img/lib/file/jajovizexovepu.pdf
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/jepodixumenizoz.pdf
    • https://dm288.com/slicice/file/525714497.pdf
    • http://lezeckastenakosice.sk/upload/files/91307192049.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ed26f4f289---24644349910.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3648391ada---7365140753.pdf
    • https://emauto.lv/index/images/up/file/gatepubigina.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16072157570d3c---97239072038.pdf
    • https://shieldtech.cz/ckfinder/userfiles/files/41347254497.pdf
    • http://aftckwt.com/uploads/file/tutod.pdf
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/39982360601.pdf
    • http://vhs1970.com/clients/873287/File/9211241441.pdf
    • http://ahxxzx.com/userfiles/202106/file/95473044747.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=roark%27s+formulas+for+stress+and+strain+pdf+free+download
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e18f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE18F 16792 bytes
font_01_sfnt_off0000f9a1.bin
3cc1bfb027fac244e657d000ecea8b57aba6d4d41a79b2d4ddb462d2bbb36f8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A1 18308 bytes
font_02_sfnt_off0001295d.bin
c8ed562f265d602cb6bf9ecb9aaa169d463c332ea8a12446606e4383e9339a69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1295D 11016 bytes

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