Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba505ad7440fe259…

MALICIOUS

PDF

92.0 KB Created: 2021-09-04 11:20:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dd129e22d95b498ceff035c8b3996540 SHA-1: d14ebc492bfed9054e8ebd4f8c0418fd0e089fd9 SHA-256: ba505ad7440fe259a64d3a883a0ecdd506ee0bb77797783e7fbaf7be712acddb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ClamAV as a phishing trojan. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites. These links likely serve as a link farm to distribute malicious content or redirect users to phishing sites. The embedded JavaScript may be used to further obfuscate the malicious intent or facilitate the download of additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757abcb7b61---nolozuvabe.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/abc83302695bf43f9bbf1fd9fbd41822/88520458937.pdf
    • http://scuderia512.com/js/upload/files/pelirudaboxaju.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/6be771988162f62ea2c7a901b7b5e838/pijabemetokitaludu.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/3f2886e17c6b33ba025c76b756be4846/19110717678.pdf
    • http://3e-recycling.ru/app/webroot/filesfiles/guwedimewojogemukav.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/n1ovgd3dql52cra44kagm8p1a7/jexegujuravif.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609de1945f3a1---kibuvixuzaw.pdf
    • https://alternativecarrepair.com/userfiles/file/vogefuxinuzewivezivimenaz.pdf
    • http://atomleasing.ru/media/File/veronokug.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/d45rhc933s4b7tmdv2vm30bqpr/gupeveromelidojawunije.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1610edbb09b6cc---23023237229.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/9309c8l4b0j63mhbqnmc0ho1bm/zavejetaraxu.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/0d07560cb5904c53ef35cedbceacb9e6/10375030835.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16107268a76d3d---vujoxuxofowe.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/2bill4d8gdehrfspqjl4305vok/19399904985.pdf
    • http://tensoinox.com/userfiles/files/49642652601.pdf
    • https://sssmri.com/ckfinder/userfiles/files/mafedusiwunekuwa.pdf
    • http://www.musicboxpiano.com/contentfiles/dukokojatoxopusivesope.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160aafe47361bd---lojop.pdf
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/jevapopamilixik.pdf
    • http://thunderstar.cn/userfiles/file/20210727234827487767203.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=continental+girbau+dryer+parts+manual
    • 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_off0000ff85.bin
f9e6fb7926d13b1dae55887710fafcfe053e9b91fc3ba78166d17ae6cd668ac1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF85 11120 bytes
font_01_sfnt_off00011918.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11918 16792 bytes
font_02_sfnt_off0001312a.bin
16abdcfeb6d3b30d0d1187190f73e5be450d845ac3ae5c60110e3041081bc55a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1312A 19028 bytes