Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ab717765d3a136…

MALICIOUS

PDF

84.7 KB Created: 2021-07-03 18:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1b04d0a5a9cc4d845ae13388da533ad2 SHA-1: a60a51eeb892f756d416e938cb2f4e68a07fb781 SHA-256: 03ab717765d3a1360247f230c31cd5f21bf185b33aab95253cbdb1078b97743f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous URLs, many hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to distribute phishing content or malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://macabrey-luthier.fr/data/Files/96381581970.pdf
    • https://study-abroad-travel.com/ckfinder/userfiles/file/32877542343.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b80755cec48---52246025386.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16079dffb3ec6d---xekabekepuvagubopivox.pdf
    • http://designbeginnings.com/upload/file/nerojowadidisila.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/35813cc4gsg8kdqb7ro3v9im84/jozekijuduwafa.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/6b10e56da33ed9e3ee7ffe16fca65d81/99967110964.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/46hb1t5k8lpf8lr76tf0avteko/34561095235.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/2c6d6527abe2ae30e4bae186135094ab/bowotepedox.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077ff05ebfee---77001797568.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608447da4d7ea---37504949970.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085b5dc9f5ac---35608200634.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925b7e5ceb0---57017518840.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/uua1ohrk2sdanv2ae94vo2badj/47531238735.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/9543e607c0b1b5104d084b06883806d7/13968424582.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d97e85a55---67582658375.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d6ec4852ec6---jatobukasisegopejinojikep.pdf
    • https://webmenuplus.com/images/file/kawubabuwiriwuwa.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/cc10dc528a5a2ece0d5ee8720cf67cd3/pemegofujebivo.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49844bc901---89759276486.pdf
    • http://vector-luczak.pl/new/fck_user_files/file/55831585467.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+do+you+know+when+your+ovulating
    • 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_off0000e8c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C9 16792 bytes
font_01_sfnt_off000100e0.bin
a5bb5f641a88cb0ae9358343e9c8ed9413839b0f919af6006c74b642f2b6f62b
pdf-font-stream PDF embedded font (sfnt) at offset 0x100E0 10808 bytes
font_02_sfnt_off0001197f.bin
cb56704b8c2013cecc39340d809a7dabc9334ed40269d5e596f36e25f7ecc804
pdf-font-stream PDF embedded font (sfnt) at offset 0x1197F 16896 bytes