Malicious PDF — malware analysis report

Static analysis result for SHA-256 61239e31037d1050…

MALICIOUS

PDF

84.3 KB Created: 2021-06-08 19:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5f053db877b6bbc4996d3ba21a2543c7 SHA-1: ff91480d845ec696f3f63cd36d5265bc78121a25 SHA-256: 61239e31037d10501ab48425a67b4d32fdadea0c5c88cbc120a763e759f701dd
156 Risk Score

Malware Insights

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

The PDF document contains a lure for a "Clash of Clans unlimited coins and gems generator", which is a common tactic for phishing and malware distribution. The document embeds multiple URLs pointing to compromised WordPress sites and other domains, likely serving as a link farm to distribute malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 https://smidgel.ru/uplcv?utm_term=clash+of+clans+unlimited+coins+and+gems+generator PDF link annotation
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/nlhre3e8rbgvs88sbgv2hve1e2/98445756868.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160920ec85cd51---84582590485.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/647af80d76b96f39f30347b6545839d9/52037041489.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/taxebuloko.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/886a49563257ea9753a4ac8e2a52355c/sewedavabowezo.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609834a9771e2---33689043115.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b0d00b85c---gatonikew.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/58641795201.pdfIn PDF document text
    • http://alkanboya.com/files/file/%5C/lumisila.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/52303627183.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866615606ee---92697880564.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/xazojolujamavapufiwo.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759e4373168---sipumaxeser.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/limaritu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE010 5340 bytes
SHA-256: b8dd5b9265b08b0f60af3f100f7fc722563d9487192bdd73c6338291538e9669
font_01_sfnt_off0000f200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF200 2112 bytes
SHA-256: afb52987f298f07af809284f40e361a47f42691a8b8224f89abc1e600d776001
font_02_sfnt_off0000fbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD2 10328 bytes
SHA-256: 5ed2e497f94a3b2324a04da422eb2b7245355b05be4e98d69f0ab2d90fc89a7c
font_03_sfnt_off00011f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F75 16144 bytes
SHA-256: 2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174
font_04_sfnt_off00013474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13474 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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