Malicious PDF — malware analysis report

Static analysis result for SHA-256 192bd59b42d4a645…

MALICIOUS

PDF

68.4 KB Created: 2021-09-25 08:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a8489726c948fcb33c7d55be7c672a93 SHA-1: 83c0145b6facdb5b844c5538814011276f5fa92b SHA-256: 192bd59b42d4a645b37ec155e23f51a70e9c8c04b96f0b35d8c35d3285f6aea0
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-heavy nature and embedded clickable link, a common tactic for directing users to malicious sites. The heuristic 'PDF_IMAGE_LURE' specifically indicates this. The presence of numerous external URIs, many hosted on disposable domains, further supports the phishing or malware distribution intent. No scripts were extracted, but the overall structure and URL patterns strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 2 text block(s), carries a click-outward action, and is only 68 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://smidgel.ru/uplcv?utm_term=best+game+in+the+world+in+play+store
    • http://liveranigioielli.it/userfiles/files/79163033659.pdf
    • http://evaemlak.com/userfiles/file///98422667495.pdf
    • http://recviem.ru/img/upload/51361193043.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c00721a275---rusenoxulaf.pdf
    • https://thefertilizerproductionline.com/d/files/gogapuxolobabil.pdf
    • https://sanipro.ma/app/webroot/uploaderfiles/jakarotevozodobenelexi.pdf
    • http://huseyindurmuslar.com/images_upload/files/46656136427.pdf
    • http://materialdeestudo.top/userfiles/files/99108599127.pdf
    • https://evpersoneli.net/ev-personeli/file/kukavububozudiziwatow.pdf
    • http://trust-law-firm.com/userfiles/file/20210922172435_211844751.pdf
    • http://ahkkpcm.org/userfiles/zavofunozeditopij.pdf
    • http://citra.cl/userfiles/file/fufinabakosukomuxolituf.pdf
    • http://qamsar.org/userfiles/files/41032028898.pdf
    • http://sswjeans.com/files/29694272376.pdf
    • http://sotel-perm.ru/site/file/9587555819.pdf
    • http://angelcabrera.com/FCKfiles/file/mamopiwiwapolosebowetube.pdf
    • https://aymfly.com/aym_image/files/3521546891.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613764f9e0767---27887891040.pdf
    • http://ilkyoukais.com/Images/Media/files/42335840739.pdf
    • http://iiiemjobs.com/FCK_Editor_Images/files/jowadeguxegitejobuv.pdf
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/dijad.pdf
    • https://yourownadviser.com/ckfinder/userfiles/files/bigokosasuzenabubuwudeva.pdf
    • http://epwuae.com/userfiles/file/paxapirujuj.pdf
    • 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_off0000ad87.bin
afe84b6c6279e012d23767e53e663912b31317d5d92d67dbb5be26ea9f6d1025		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD87 11092 bytes
font_01_sfnt_off0000c713.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC713 16792 bytes
font_02_sfnt_off0000df25.bin
56a27c5201b8a1f524c10503572c7c2173d0d567d03b8c6b3fc2479d6b1b1eff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF25 14636 bytes

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