Malicious PDF — malware analysis report

Static analysis result for SHA-256 64af65acd07f284c…

MALICIOUS

PDF

83.9 KB Created: 2021-08-22 02:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c9c22887b0165dd82f72fb48f9cbf004 SHA-1: 99ffbf03f079a0109adc09d90c2080204ec9a826 SHA-256: 64af65acd07f284ca5859b1660d6e23ceea82e5162ea36ab7da4fe24e0fd8d13
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. These links likely serve as lures for phishing attacks or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db288b38eee---57483455685.pdf
    • http://www.hgbehringer.de/img/files/files/xopaxugaxarokedepalenigo.pdf
    • http://thegioioto.store/upload/files/dorapiwagojikerakuvubuxi.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/590c02553a241589995954591c1f047f/baritejojefuruge.pdf
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/58148901655.pdf
    • http://babywagen24.de/userfiles/file/gerazetopamerapa.pdf
    • http://ilovechardonnayhills.com/userimages/tixokiwe.pdf
    • http://fotografoenricogiampieri.it/userfiles/files/84535642126.pdf
    • http://strategie-online.net/catalogue_dynamique/file/51070721474.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28777cfb77---25891127900.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160818580b3054---faduw.pdf
    • http://kbchina.de/upload/32818256541.pdf
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/71073260468.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/8d8d9255f17f1c4a4c4ec0c9f415e8a7/69419368037.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/hss22ndenjch1tparvjoo528tq/vedudixajejofininosi.pdf
    • http://baugeraeteverleih.de/benutzerdateien/daxajijidi.pdf
    • http://samurairamenbar.com/uploads/files/kopuge.pdf
    • http://www.knickmeier.net/images/pageimg/file/44249494010.pdf
    • https://panificioilcavaliere.it/userfiles/files/riwuzexunojupat.pdf
    • http://bhttourist.com/upload/fckimagesfile/xuzuxivus.pdf
    • http://cn-noah.com/uploadfile/file/dejomazekagutozu.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609312b86ecde---lizexukuxe.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16090d7f98fa7c---gowonolexitiwetotodi.pdf
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/gq16q6f69a15i6aaeea1idr1il/juginalotimumovadimezu.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bf493222c---68432729711.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=free+iptv+apk+activation+code
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db45.bin
eabfb3593417ace598295f60f9c6f66d70976d440f658bb4cd4aab1c73f9c010
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB45 10428 bytes
font_01_sfnt_off0000f304.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF304 16792 bytes
font_02_sfnt_off00010b11.bin
478d64aad58a46c60a63c2bd6d05d9c39068b35528f549688063ac651822ff24
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B11 1760 bytes
font_03_sfnt_off00011368.bin
6ca087f66bf6004b314bc63f0d0abf5186793b2a8321c02be605503f3bd744fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11368 17676 bytes