Malicious PDF — malware analysis report

Static analysis result for SHA-256 0add3e7fcda1e902…

MALICIOUS

PDF

78.9 KB Created: 2021-09-16 14:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 087406ce2dee148caf019e0ffee6d1e3 SHA-1: 4803a0eeebb3525d541325896369fcb24792f1fc SHA-256: 0add3e7fcda1e902f787281b04a64f5d96cc65f47630793d6f6834f1e58e612a
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to domains that are either compromised or disposable, suggesting an attempt to lure users to malicious sites. The embedded URLs and link farm structure strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://homespakistan.net/magzine/uploadfiles/file/73719277647.pdf In PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/dokavoj.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/kivuvorivuvurim.pdfIn PDF document text
    • https://red-adlay.com/upload/files/jogoserexikibu.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16132285e15f59---11406271501.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/68231024960.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/kser8a64h5nr3s6dn9voje80fj/sosuxeb.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/migogenobig.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/70789002211.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/lunefuxifofipenejozisit.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/c9a4396904ed1a4b4d3c16a52c0abfae/91724909370.pdfIn PDF document text
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/16136726358.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/26843003079.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/vizazoba.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/96556020545.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/lesiras.pdfIn PDF document text
    • http://studioguagnoni.it/userfiles/files/bumipujepevew.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wobot.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1753da1e5---64091036018.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/43090486497.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/mqamcj8rc85jjf5oc3ahsom6i2/danimegukagevawawejigoxa.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/15918314814.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/74579264339.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/rezodewebozexiwiman.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=is+carrot+is+good+for+weight+lossPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D1 10688 bytes
SHA-256: a844204608f750d56d71480a8449a3096f5cbb79816a6af9815a84447ea1721e
font_01_sfnt_off0000ea5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001026c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026C 17128 bytes
SHA-256: d857863d6448def8f84cc2173d44eda07dbeeadf3bfe7c035be64acd89714528

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