Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cbecc19e02920ac…

MALICIOUS

PDF

75.8 KB Created: 2021-07-03 05:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5252de6e66880711e2de2b14577465d4 SHA-1: 04b26ea9d3dcc44e666d5c89405cf87c8e7a0338 SHA-256: 0cbecc19e02920ac82cdbf6b2eef1b1a1c3255e4cb9a624e24771706b37a3d99
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. The presence of multiple links to potentially compromised CMS uploads suggests an attempt to host or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/475b53fe6e47a7058be8fda5f6c3a525/97403975286.pdf
    • https://abeess.com/userfiles/file/wisefeduwakemazumevolejos.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875479c24ab---28010949220.pdf
    • http://fandimnarodaku.cz/upload/file/46287326792.pdf
    • http://www.bandungmesin.com/file/rolazikenuxowasadivux.pdf
    • http://rainbowcaterers.in/userfiles/file/76481185781.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/db6589965f8d9aa82b1c4b2a76ca39ab/gokomoziwoza.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f0493a9ed---11445633115.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5f333f811---48698739195.pdf
    • http://aps-mes.com/files/file/58101558298.pdf
    • http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/57120515348.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606f019f1a0ef---xewalenamunew.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/bc26648be96531862e4dfc1a3f6c162f/movuzegotafimi.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4b82027e---kojozisev.pdf
    • http://prime42.ru/userfiles/files/pivesiwo.pdf
    • https://totounited.com/contents//files/vegoludakulixanofupasid.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ca99152d9bdfec171b6700f4a77b5c6b/kiwal.pdf
    • https://michelbarbot.com/upload/files/rasozuxajunafibomoge.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/8138e172e2f11d0ef71897dc1fd6b9d8/podenarilejajosejibulef.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/ouu51vtvvsv09vl9lcumn2cvv3/59579994731.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/b2bfd9c007ef64a1be0a1095d2209ea4/39154912962.pdf
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/75906782832.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ufkjiqgs8q1c84mr0k9kigra0i/figubenesubiribadefivibe.pdf
    • http://renovfab-menuiserie.com/userfiles/file/rupirepuwovefirekovi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=high+paying+stock+market+jobs
    • 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_off0000c4ac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AC 16792 bytes
font_01_sfnt_off0000dcbe.bin
a1bbfb765695635c627644160ed4a96769a2b9ed816bd530772b52f6a67d5b62
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBE 16640 bytes
font_02_sfnt_off00010821.bin
41cad942329321eda8bee0a2a175519ddacf82268aff75e91f162589974abb00
pdf-font-stream PDF embedded font (sfnt) at offset 0x10821 11244 bytes