Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc07dd67d93877d…

MALICIOUS

PDF

79.0 KB Created: 2021-06-30 02:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5856eb10eaa64a1728ea0e15c60057ff SHA-1: 78570cd023076063823e346ae0d53dad302aacc5 SHA-256: 3cc07dd67d93877defb210801f1c5ccbaa3210f2efb5cabb4182f212562411ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. The presence of these links suggests an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607411f902929---80157760932.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/3f3b3904b3882da885399c77f02ad19b/lefodifo.pdf
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/qsgv90btr92e6g4mj9ubv7moke/95202218140.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/77fl2r19f8d3kakond3p3hug0f/sijerozutal.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/1pdbv7a2u73rbv4h57quplqov1/11538850647.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ecd7ee62c---12760023814.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/m2caqcosdrqfem886qb8v6p514/jobopobedebowebezaxovug.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/5a23aff5e26c85036f006978e98261f1/fuxakekazofivukokokese.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/2d2jneckcvnvbgtume1hgu89t7/zapigixosugenasowasujixe.pdf
    • https://artlabjo.com/userfiles/file/pemefugutudoxaromoni.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160855cc633694---31403948166.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/aa7egbm022tj0632uk6c24e6qq/38584727846.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/7ea8f95adfa3d401088ad35a2f145d20/zuneduwabozufi.pdf
    • https://paklya.su/design/img/upload/file/kumexepij.pdf
    • http://telekommarketing.com/firme_data/files/xifusotukesab.pdf
    • http://seanmore.com/userData/board/file/libujokoseru.pdf
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/6af814ee39f842ad5d55e06c21b49373/jadevi.pdf
    • https://nepalaviationmuseum.com/userfiles/files/97156287164.pdf
    • http://porpora.biz/imagenes/imagenes_contenidos///937593266.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c820fedebb---60888932853.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/214592294a02411762199be66d85545f/jivutupezumebe.pdf
    • https://chrmglobal.com/userfiles/file/24899609695.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=irlandes+in+english
    • 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_off0000cf20.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF20 16792 bytes
font_01_sfnt_off0000e732.bin
bfc88eb6d5b5563e4dfb6197c3e1a65b333c2777c8164949b211e2071912a3ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xE732 19140 bytes
font_02_sfnt_off00011717.bin
bf6dac0703a371fef4d7a42f258e06510dd02c0d146e635bed4248762cef70c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x11717 10260 bytes