Malicious PDF — malware analysis report

Static analysis result for SHA-256 972b35b754de904a…

MALICIOUS

PDF

69.8 KB Created: 2021-09-03 02:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 726328b12d175b3a63840297426676ba SHA-1: d4ea874b275570dbc5636a4623891fa3a2e81ebc SHA-256: 972b35b754de904aa02a347878ef03bf5063a9348ff9c94190492d201672956d
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many of which point to compromised CMS upload directories or are part of a link farm designed to obscure the true destination. This suggests the document is intended to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://dancleland.com/img/upload/file/6688495657.pdf In PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a94d1b6411---xozametikojoje.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/47191389026.pdfIn PDF document text
    • https://eslms.com/userfiles/file/47542086329.pdfIn PDF document text
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/mevitezizedagejol.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/6eb9b2366ada83de2e971e9e7e2709cf/danugewekuxizol.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/gakogixelabowigikiw.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d548574f8e3---vugukarefurenesudavetil.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/17981950794.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/17f06877ac384fa22d37d46155f938ab/52947060068.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/sirezulurigiwuwumo.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/mibogixunolokemibebinuxo.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/turebasubupen.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/246369770.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1610a8e7b59b78---bowidujezoxomoluru.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/sewuj.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/08/03/dilosasob.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/6cc83f0a40a73ac2342d80b7f11989d6/45932914537.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/8db84670a4b9ae87f691976a60f50e71/91139188352.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/2ak21e3jeeq31cqjvo6te5dd37/81305572474.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/wiwovifavedovozatidovojo.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/xatunefixafujewel.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16103bb29856d4---mekefutu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=modal+verbs+quiz+pdf+with+answersPDF link annotation
    • 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_off0000b22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB22C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA43 11188 bytes
SHA-256: 8f096bb153d546b4cc9b611d055689027bca04111f2adab610dd16d94551a7cc
font_02_sfnt_off0000e401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE401 14892 bytes
SHA-256: 5793c9c13a4d3572f942680f0bb8a0fa380f0328c988ddd368196c60fbbc61ee

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