Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7502dcabaa4169…

MALICIOUS

PDF

86.6 KB Created: 2021-07-14 09:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f84e885d6d50d730d67c511d49f3ed2e SHA-1: 08f73e47e3f85f80a7a31b6d4d742c1753deddbe SHA-256: ea7502dcabaa416941f9fc7ac6b9d6e139a414db34f596aebe36fa04dadf2293
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to compromised WordPress uploads and disposable hosting sites. While no scripts were directly extracted, the nature of the links suggests a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecfed7a1af---ravamiro.pdf
    • http://citescolairedeledit.com/include/file/23712421846.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e78ae2da63b---xojogotowulabawezusoforuj.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16078eefa7674e---mebokixodu.pdf
    • http://dsm-trhs68.com/clients/8/81/818e764d3414495a915a5f66638dc9bf/File/xokonalewin.pdf
    • http://bilmatbasim.com/userfiles/file/18231028544.pdf
    • http://stylekd.ru/files/nawejomefutizi.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe7b3c1899---60554020078.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bfb2b4334---zanuwoxemogu.pdf
    • http://webinside.pl/userfiles/file/10023608289.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add584b81d6---14510060173.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca3ad31a9a---siruz.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16072db1b81c76---vipodazujimedivol.pdf
    • http://chongthamnguoc.vn/img/files/sodudedes.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/f7b75276f44c9701028a56e9bb51de0f/nozomiliniwexoxolowavab.pdf
    • http://fatamorgana.fr/uploads/assets/file/24014234735.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c9c3e477b---4931912920.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a894ab6f1---suvetiwifuvivoxusutaw.pdf
    • https://flyingfish-stay.com/userfiles/file/jifef.pdf
    • https://xn--arbeitskndigungsrecht-best-5zc.de/userfiles/file/88959928620.pdf
    • http://siltherm.com/ckfinder/userfiles/files/92234458502.pdf
    • https://palcev.ru/userfiles/file/saxexopujutabugokukekeri.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/3fiheoh6e9816r4pg3suak4jj7/6970672001.pdf
    • http://bezpiecznamlodosc.org/files/file/49658222843.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89a811f86b---mapaloletepebulev.pdf
    • http://uk-finansist.ru/userfiles/file/popaju.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/i43acodn1cg4lc78878kivrhm1/mutixanotimoti.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=congress+has+the+power+to+declare+war
    • 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_off0000f057.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF057 16792 bytes
font_01_sfnt_off0001086e.bin
b38ab6e83266a011c1e65bd01659ca1d445d095d1a152892bebee562624d9d43
pdf-font-stream PDF embedded font (sfnt) at offset 0x1086E 10816 bytes
font_02_sfnt_off00012142.bin
bbf2149b5c59d4ecf66862d850167f8be8328bbef2280a329a86543715d490ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x12142 16644 bytes