Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2796a1e95240aa…

MALICIOUS

PDF

84.1 KB Created: 2021-06-25 12:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 596884bdc904c438ba3843e4dcf48a7a SHA-1: 66e3bb605b036a89dfa2e71952ece9add226c33d SHA-256: ca2796a1e95240aac60734fd51d0e02f2345492645590c159bd1d608ce30cbb5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. It contains numerous embedded links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a phishing or malware distribution campaign. The file's structure and link farm indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://garglob.ru/uplcv?utm_term=devenir+leader+pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160950d181b3bc---xuwovinabaviluguva.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/356e6a7df6f1f938733e78fb8adaf082/xolubejef.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/hmstek2bm8valdlc81j7rpm9bp/laguzexive.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/72a862afe112ee883760766996dc5bb4/lasosavu.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607127785bf5d---87071264688.pdf
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/peworuraxewevereze.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ccadb6cc7a6---28298866736.pdf
    • http://stylekd.ru/files/wikatarexof.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/9v2ntir17ssb4e6gmlqhofbof1/likezo.pdf
    • https://porterbrothersltd.com/app/webroot/uploads/86777714842.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/tietalbosp1bvqdhg2h8k6p2p0/5235712955.pdf
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/pufoxoxiwopojusamezip.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4c45af4ce---lasojolobapegugume.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/v72ngnlg61rmn2pjj9r7oi8tv1/jafagil.pdf
    • https://rosycaffe.com/file/pibikonozatat.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/eb3bea12fb6a0097a1e0f8481827a54b/satifowoxa.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c640f3d2c53---30570476674.pdf
    • http://morethancars.nl/uploads/edytor/file/vojopakotisefojujepa.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_off0000e462.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE462 16792 bytes
font_01_sfnt_off0000fc74.bin
c3d336b14aff24117c7e83bd2d18a9e67d56be9532bf81dec2740010047cdf53
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC74 18428 bytes
font_02_sfnt_off00012b4d.bin
6f8c48e72e492447441210017bf2efe7873ae9a40b57b32b63ac3216086f9050
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4D 10172 bytes