Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe93dbd322c134e…

MALICIOUS

PDF

85.0 KB Created: 2021-07-13 00:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 59c33512ffe110da2a3a01ae964b15ef SHA-1: baf4f0090fe0982a63d339d50a0fbd30da0ec7c6 SHA-256: abe93dbd322c134e2e8be7712fba760385984fe820d5b2e45a4d6309c9b1f0fa
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to a link farm hosted on compromised WordPress sites and other disposable domains, suggesting a phishing or malware distribution campaign. The document body is unreadable, but the presence of many external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://nomylo.ru/uplcv?utm_term=i+had+a+seizure+for+the+first+time PDF link annotation
    • http://phuocthuan.vn/images/pic/file/zegami.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/velovizubaviziwuwafazi.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/wazizolegez.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a6e25ef98---74500616075.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/monagogujegil.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/f9677801af608b036e7cd3387095a550/xezetujaluxoxitunepuw.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081646885860---donurelexikelad.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/37fc0571e680e75dd0a63f6dba4b3bd8/bazinamijoxufukaw.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16072465580ff5---54426432883.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ac63c29a7---mukeminikibora.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f294ae5a1---72169735699.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/31c4a41af4e800bd154bcf1623c00775/86926019806.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/21097324103.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/11744875013.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/gukojej.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608563c49d2f4---lizirawibewokinenaliteb.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160d470d3d5c8c---welatojurukimat.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdd0987bf3---5754431284.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/senakijir.pdfIn PDF document text
    • http://falerisztika.hu/tmp/94180782736.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/eea0afa4cd43cbdc37f6b26be903971c/mizasuz.pdfIn PDF document text
    • https://mfdesign.hu/files/file/28933968917.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_off0000eb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB95 10580 bytes
SHA-256: ec1194406c536cd7dd6f9aeacc7c97a06c146b300b02b72c637689c3f4565ca7
font_01_sfnt_off000103c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C1 16540 bytes
SHA-256: 83e24dbe1feed2bbd29db2c01bcee74f205d2d4cf3299e71b042d5bc5f6c99aa
font_02_sfnt_off00012eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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