Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a3385e567ac345…

MALICIOUS

PDF

90.5 KB Created: 2021-07-26 01:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: c9f75494b2d64a916eefbd603b976992 SHA-1: 613e4a87603225bb45617ff05e28991bc00f49e0 SHA-256: 70a3385e567ac3455dc7aceac656f7ba01d37b7c1012651384ad46f3800e4fe3
156 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and contains no readable content, further supporting the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d066ed87268---bukosenevulodurukudakugi.pdf In PDF document text
    • https://faresaldabbous.com/uploads/files/gavatigedazunofi.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/d29f18ca69624942226f30058ed35318/tefidej.pdfIn PDF document text
    • https://tavio.ru/files/file/59812913841.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/79210696222.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/5e23b721bb5b0133a7ab4093e65ac360/lisaxafokawuxeku.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a257e5b5629---pegeruzofewivet.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097faf510a0e---2251937928.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/d8fdd794926907599353d25be829f891/27490075425.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/refifeloxebibazowofid.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/21264595847.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/f47d9378a5de34556748f7950a66428a/71565475082.pdfIn PDF document text
    • http://etnorom.hu/pictures/wopomazijowovigurex.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/ropukodejafofaleg.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/4830511915.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607a575cb91e4---81424833016.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/7b00c36aeaf6f6fd1052e79422ceb8e5/sopupimutipezi.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/kuguko.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a1b2ef1252318c0e42cce4037551e99e/lotaterujub.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/ea0f1b1659473ee885b09084b8d5448a/feworixoti.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608092fdf1f08---razidebutegukunoniz.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/32e9e967752e4d9e74530d18c87efb80/61205236484.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/f505c276ea62e48ac670b0b6b46712c3/53611816868.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/43404346925.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4992dd126---kavokovevazidesewunujipoj.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/2rphr8r430gvu5f2u2lqqdjl11/wamuxabasisabiwepu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=rain+bird+esp-6tm+manual+pdfPDF link annotation
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/19823606884.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_off0000fce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000114fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FA 17268 bytes
SHA-256: 80f01177524ba2c76fe7c8d1c35444a89d29a514debde1360bdcf2e5272fa675
font_02_sfnt_off0001419d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1419D 11024 bytes
SHA-256: 9e5915c184383949f512951119987c813150363535b264f8a5f076272891938f

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