Malicious PDF — malware analysis report

Static analysis result for SHA-256 374ed31284160e68…

MALICIOUS

PDF

84.9 KB Created: 2021-07-01 21:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ec7873a6f01bcb116685714fe3865ab SHA-1: 9d52f5a4f47a9a3ed4ac84f78d359a7ab1e127cc SHA-256: 374ed31284160e683dc870c09c647edbb2dcc7fcb71b96a3e755acb9ee44f247
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as a phishing trojan by ClamAV and ML classifiers. It functions as a link farm, containing numerous URLs that likely lead to malicious websites or phishing pages. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests it may also be used to trick users into downloading password-protected archives, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://medvor.ru/uplcv?utm_term=get+free+instagram+real+auto+followers+by+malik+vasid
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/7hvb9k9btr9k1k1sod42l95mqn/67024241507.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711abbc39e3---lefasogobepedikoluvibemak.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/c2f75ca1095010e37eb666c684dd329b/95435934219.pdf
    • https://12waktu.com/contents//files/91033501975.pdf
    • https://karinbentum.nl/uploads/file/rijuke.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/a8de40a7d69a4fa5e507a930d82531fa/bigobevododajo.pdf
    • http://micronforgacsolo.hu/UserFiles/file/vetonejaridefovawu.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1d7742f0665587211049290df995d158/wefajavonesurerira.pdf
    • http://phamtrangia.com/upload/files/10755442845.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b034e841b78---38787527970.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/95b279df06b77a732d04558912a27efa/kuvixoranosufovoj.pdf
    • http://nuraski.pl/wsg/userfiles/julefuxibefaxijefopetegi.pdf
    • http://novichiha.ru/pic/file/livazaw.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f7e58dbe1---28280146786.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/f119a34e28b272f7b08c1c32924952ca/modiwir.pdf
    • https://vydavatelstvoklett.sk/userfiles/file/pegofu.pdf
    • https://bloomeng.com/uploads/daletudatuzabo.pdf
    • https://jotekonybakterium.hu/userfiles/files/lopiminigovedaderabod.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607daac056ea6---90344570595.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160889d538432c---85947870728.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/7ea0be29cbec7ba4fbf80bc52e24841e/54911324945.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a51a4d004a2---zuwefigokum.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_off0000e2d2.bin
b546c01cac1bb29ec30a85051c1b209b43cdde2e3c3ce64372d2e640e1566751
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D2 17728 bytes
font_01_sfnt_off000111bc.bin
bc0632baceb150935f405313569971701d241c0e1b03afe2a79f80de7200abc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x111BC 11336 bytes
font_02_sfnt_off00012c4d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4D 16792 bytes