Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e480cb525cd77d…

MALICIOUS

PDF

92.1 KB Created: 2021-07-21 17:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a38b53842076db85b141afe0f2baa6db SHA-1: 8aa51ce160f9c0e375ac76cd1f56f4f810d13cdf SHA-256: a7e480cb525cd77dac1c145a990009992e3f3a1aac7cc4fb9c21d13593a10f5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It functions as a link farm, directing users to numerous URLs hosted on potentially compromised or disposable domains, which is a common tactic for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://riggi.ru/userfiles/file/namusupagan.pdf In PDF document text
    • http://argol-editions.fr/userfiles/file/rizozumexozurujixat.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c49b89672d1---63322128171.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/0741cb8585bb3ee9129ea50b5acc11ee/42900189159.pdfIn PDF document text
    • http://haniltm.kr/upfiles/editor/files/28434327939.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/85f7f45e7c4c51e36f5a4237c8058cc3/79752301212.pdfIn PDF document text
    • http://sbkf.org/files/files/dewolofudopowopijezeze.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/63293164245.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608353f505669---degedozumazuderodekenoroz.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090df872053f---34472694645.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/fc1c9deb1e862ab92e34430859ebd32b/95366587907.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/a97116656e781b9005a75f2aa1aa15f4/bogivejipefumoduvum.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/f0ae811b339222da7dfae354a467476d/tizezoxodewi.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/mmrkb9hsfdqpn0eksq2k9ouc5n/vawanedadog.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/4bb72040cec952934f2ad2d05adeaa97/wopenalox.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/9316726dd3e82911c2ac0548a773a4d3/80398023616.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/f0ba340b04b1ef21aaba2dd060f02bab/gazenerivafotat.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/10191223981.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/28193920409.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/402c90b3adb48dbb57a9de471f5e7b77/zagoseg.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/96824499377.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=home+for+sale+in+nolensville+tnPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CA 10432 bytes
SHA-256: 8423ba3da216fdef3cc9f3bdadf4b697e90d6804c6abffe1735b9dd2eb289b3a
font_01_sfnt_off00011f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13779 16088 bytes
SHA-256: ee4244dd43d44623428ce80c5864e6c805a407f7f8f7b9fa828465f17fec610a

Open this report in the interactive analyzer, or submit your own file for analysis.