Malicious PDF — malware analysis report

Static analysis result for SHA-256 add0ef9b594807bb…

MALICIOUS

PDF

87.7 KB Created: 2021-07-03 00:14:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d86de378fa786e8d3557981dc0d47c8 SHA-1: b836157d98cac8c8f94950cab48729bad2330df3 SHA-256: add0ef9b594807bbbe6c8a474f9ceef8b2b8bc13f3802a214d79d366edb0f49d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of multiple external URIs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=how+many+ounces+in+one+shot
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/7ae1db326928f00d413c06e91abe8ca8/jeligovibabubux.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/25224424772.pdf
    • https://evpersoneli.net/ev-personeli/file/dowazuzudumomewaxalexa.pdf
    • https://istocdukkan.com/userfiles/files/29854200115.pdf
    • http://szyldkj.com/luodan/images/userfiles/file/96558327802.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed0304df49---84506371692.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/luoqu8dgqii4pf7kqim1e7rdk3/furesidufuduxipanipiwejis.pdf
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/17982781179.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0615d79d8---39082825266.pdf
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/muzonusexo.pdf
    • https://festival.bg/fckeditorfiles/file/4445577919.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607b08aebd334---zuxezenutuje.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/2uh11j3v82uo4v4jkduv9qlmq1/nesiw.pdf
    • https://bcbc3399.com/upload/files/20570079340.pdf
    • http://jevades.com/aircraft/fckimages/file/71470959945.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01864f1fdc---71735992884.pdf
    • https://imagebuzz.net/ckfinder/userfiles/files/31827195002.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607061d5c6d08---vorejibesatelurijed.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/07ff51021f8b6087daef81e866ed6616/82399697826.pdf
    • http://dmhu.eu/uploads/uplib/file/54737265026.pdf
    • http://fujavietnam.com/images/Download/35468271304.pdf
    • https://psychologgia.pl/Upload/file/25940369191.pdf
    • http://expresskaliski.info/file/11480629984.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607207d18d5f8---fezixiwowavepele.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_off0000f78e.bin
84927f85d375aae7e148943783945190fe5716c44e7e6d9e3e3c3878eb6d06cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF78E 16220 bytes
font_01_sfnt_off0001217a.bin
2dc8ad007f88c2264792413b31086846f2a6ecd1f6a4164e7e3f1de3b61c25b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1217A 10640 bytes
font_02_sfnt_off000139ba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x139BA 16792 bytes