Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4a9069282e31ac…

MALICIOUS

PDF

80.4 KB Created: 2021-06-27 00:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da8fe7cf2539756b63c42d64bacbf9dd SHA-1: 4cfd3cc6b5575472e460178e5269963d0198540a SHA-256: aa4a9069282e31acc0dd481a642f2b7310b1174e567de921726d06a83e06e765
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm with numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to direct users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://jarosi.hu/files/file/27963211714.pdf
    • https://rmp-traueranzeigen.de/cms/files/3585910708.pdf
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/fcf9164e063f68db7e38fb1936cefca1/libetofetozaf.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9db23e11cb---83128958928.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ouoh68h43qr0ve4f2aopsuopo7/44755733475.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ce402684f73---58010692236.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1b2449fb0---45609768474.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090d85a9a31c---28036284368.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8eb72dc69---6865453657.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092eb26e3197---21944319320.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/c3bblbb481ldp7s2lr3vv2mpg5/9784327420.pdf
    • http://goodwynva.com/clients/d/de/de91e19d235d8a3764238851c6b73f99/File/xipigetu.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/q0cp5d8se9a36cqqs2sc0j2i0p/gopazozoxonudivi.pdf
    • http://djpress.pl/Image/files/27589013322.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/c3c2c7acbc81e5f9a85a38238de89617/98991117251.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/h4uk6lchakn30l8fom4vn8h2lu/11975641577.pdf
    • https://tecnicadovolante.com/images/file/38464674688.pdf
    • https://szekszardportal.hu/userfiles/file/gepolit.pdf
    • http://dzbnf.com/upload/file///kitereg.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b96b42d79---60675525348.pdf
    • http://aarogyamedico.com/userfiles/file/54662139274.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=common+sense+book+of+baby+and+child+care+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfaa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFAA 16792 bytes
font_01_sfnt_off0000d7bb.bin
00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BB 16140 bytes
font_02_sfnt_off0000ed33.bin
7b52b6647452099c6b241ec47e273e84d720f68362f187353b0f453af5d80731
pdf-font-stream PDF embedded font (sfnt) at offset 0xED33 17560 bytes
font_03_sfnt_off00011a22.bin
895ee48ea721b771509f656a663443d60f7737892e44d2f8b688e3131b332cf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A22 11164 bytes