Malicious PDF — malware analysis report

Static analysis result for SHA-256 340e0d8ae3d757f8…

MALICIOUS

PDF

80.0 KB Created: 2021-08-06 01:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0ef133492ef337f5fa5922aa1e903c03 SHA-1: 0bc5c01914cc0fef4862534adf375656b790aa3c SHA-256: 340e0d8ae3d757f8df602fa7b7eb983e270a72fc97a03180948e1529a8e0c5de
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs that form a link farm, directing users to potentially compromised WordPress upload storage and other disposable hosting sites. The primary function appears to be redirecting users to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://smidgel.ru/uplcv?utm_term=bolo+tara+rara+mp3+song+download+320kbps+free+download+pagalworld PDF link annotation
    • http://yule-sign.com/upload/editor/file/20210616112038.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/3mgf21okm284sqe8svh00ij5i2/mawalupudopimisetujopemi.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/66018184339.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/9197469b63c74ab4574b5c1fef0c4d4c/70503927915.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c178f5e891---xenogetafuvokasazawuk.pdfIn PDF document text
    • https://actor-conseil.com/files/file/87897910316.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a82498c482e---joviwivoxeve.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f4a852010---9368024674.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/pexenofekes.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/tedeni.pdfIn PDF document text
    • http://short-story.ru/upload/file/43446266836.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/nixisebaninuseputifuti.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c779e59876---lufuzuvomuxirukuratuxuses.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/a62c5bf48a1bd48dac7688f00c81fe43/4481108301.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/arnosdi481cmuqhepbv5j14i7n/mapetabapepagokox.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/a4b32ad81088f21cf008dde5f7054962/xulifatol.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/70574707073.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608729548a6eb---10225535973.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f257b90d2---livabofozipid.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/62b3cdc38376f16a0b207b54f33734a9/13320601031.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608170eec8717---44008286247.pdfIn PDF document text
    • http://www.valaisconsulting.ch/file/miwulaboxigen.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210709_055302.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/sodezejuvotuzivebawedo.pdfIn PDF document text
    • 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_off0000cfe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F7 17360 bytes
SHA-256: 207e6a61c2a0bba1101b1add9405682aab0d75ad971239e15f2dada36223dded
font_02_sfnt_off000115f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F4 11536 bytes
SHA-256: 61dc2e4e8cd4044a73a12daabc6937fa788ca22b4ffc075df37df61f7dac4123

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