Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cfcdcc927b7050b…

MALICIOUS

PDF

96.8 KB Created: 2021-09-24 02:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: db1889fde72d102ac0e4b41b75542617 SHA-1: 660523383b82dedd64168d73b29a8026a8d915b7 SHA-256: 9cfcdcc927b7050bffad76e497a5fd6825b54bd7022867460c9edea67ade9086
164 Risk Score

Malware Insights

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

The file was detected by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites and a visual download button lure, indicating an attempt to trick users into downloading malicious content. The presence of external URIs and link farms suggests a distribution mechanism for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://blekinge.boj.se/uploads/userfiles/files/mawumuvetomonil.pdf
    • http://grandviewgroupresort.com/upload/files/buwarudetuvaloz.pdf
    • http://abnig.friendship-match.com/upload/files/16849694716.pdf
    • http://prograsifkalip.com/files/23914545245.pdf
    • http://ifaistos.reality.gr/~triantaf/images/file/12448490942.pdf
    • https://alexspa.pl/userfiles/file/pukunavadis.pdf
    • http://nollve.com/img/editor/image/file/roturikupemujekudew.pdf
    • https://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/pawuwa.pdf
    • http://tostonet.cl/ckfinder/userfiles/files/1265823457.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612f19d654b67---kamafadisafokaxatesim.pdf
    • http://harmonie-avion.fr/actualite/files/11720870317.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/c32a45a024d6da74ee9dacd741487cdd/71028088385.pdf
    • http://ykzn8.com/upfiles/editor/files/15754731560.pdf
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/92567284894.pdf
    • https://fiberglasssupplydepot.com/userfiles/files/72977260154.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/0e5q80g0laobcr4a7g40rvom1q/tejazutivagudirevekugi.pdf
    • https://pasarant0g3l-turbo-h1t.com/contents/files/lokusiparepexunakukol.pdf
    • https://portofcrotone.com/dati/upload/file/movabutazenoboteja.pdf
    • http://holzbau-napetschnig.at/tuwimuromirewabugosel.pdf
    • http://hig-hegmann.de/userfiles/file/3751677040.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/7f2cb477ff834863a84518dc04767df0/18813420656.pdf
    • https://506hlapeta.com/files/file/reberakusizewovuwi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=movierulz+movie+downloader
    • 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_off0001185b.bin
3f7ed4356fbc0d19c01e1a7774590480a0b9b6fe4798a6611cd0259bd44e7da4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1185B 10448 bytes
font_01_sfnt_off0001300b.bin
ed809ef6baf267767efaead9ff8933ae365bd38a5e29eaf72ce6a282f48a73c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1300B 17460 bytes
font_02_sfnt_off00015d78.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15D78 16792 bytes