Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f01e793a7acfcd…

MALICIOUS

PDF

103.6 KB Created: 2021-06-12 11:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfbfe9bb893370104a3fcf3a64eb5299 SHA-1: ff2bbcd5a695158166ebbc231ee1e1793c2b809f SHA-256: d7f01e793a7acfcd08b7a526cb4789ad556343438541f69577fbd3899bef0ca5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristic firings point towards an attempt to redirect users to malicious content, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://garglob.ru/uplcv?utm_term=maa+tv+serial+karthika+deepam
    • https://commonwealthsportsawards.com/userfiles/file/76628551495.pdf
    • http://luckdidea.com/ckfinder/images_store/files/popifuj.pdf
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/a0c3cf3568dd1cad39bfbb619e7d2ff5/59070131522.pdf
    • http://kfnmdg.com/upfolder/e/files/20210603093713.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ddd656f45---dalepajifivez.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/iqf1be6iqsasmopqh92qf20bu1/mapogukefefid.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6db9bd1276---dozudani.pdf
    • https://topclassgreenery.nl/images/file/purofovufezodebap.pdf
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/3402285392.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a56ef0fee2---59354639391.pdf
    • http://scro.ru/pic/file/85922890981.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/mehgt77upsck901b5dtb4j5nvg/26858932418.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6e7c84b43---jurowoxifisidaxidijorig.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/74cedc89c1ec674e652398448661e698/33431967216.pdf
    • http://sity-luxe.ru/userfiles/file/24580967539.pdf
    • https://baohohoanglong.com/userfiles/file/zubesazezaroles.pdf
    • http://klasykarozrywki.pl/public/images/fck/file/39013790409.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efa1.bin
29868c5bdc1d7deecccc9353ee669042d158d3b790a880d63b6fd6208ad5f017		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA1 5328 bytes
font_01_sfnt_off000101a3.bin
bf40ce3d410b60fe99debf597efab625d28369d2bcf061aad38f56b9575780f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101A3 56716 bytes
font_02_sfnt_off000167eb.bin
405af5cd0f1fbf8391a2b3f82f352a0061af233431c04ce3e668e02f5d95dd38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x167EB 12672 bytes

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