Malicious PDF — malware analysis report

Static analysis result for SHA-256 2677ab2032c04055…

MALICIOUS

PDF

79.2 KB Created: 2021-06-13 06:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a3ff5767cef9b4395d29197743fbdca1 SHA-1: 9b9d1b7664ce921be5655fcd8e9acbcfd2660f22 SHA-256: 2677ab2032c04055ed25beab68c4c0c4c8cb9e47f14ba576ef4670b9bb531cb1
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The file's structure and numerous links indicate it functions as a link farm, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ketchas.ru/uplcv?utm_term=iskcon+srimad+bhagavatam+bengali+pdf PDF link annotation
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810e14097dc---bifofuwev.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/199bcafe2c44c949a614c10007cc56be/gepafibajabi.pdfIn PDF document text
    • https://nevisnews.com/userfiles/vasuwibowarokujiviwozug.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/dn2q6ofv7kl2if8elf48fo0df3/8066484658.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/67666224061.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/386a5f64bb94d0144370676c9bd65363/rozamufatowezowagixis.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080619976cec---gatufimozaxedugutusepuk.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/se3nq34vd0682ottht29dhpbq0/15577528845.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/e841bd03ce3788b87c7b03213ef9b96c/4714720273.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/d570a61eab6ebb7a5338ded5a93b1eaf/48315515253.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e91be00e68---4378694866.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/do8fgd3mij34kkcs2ebbhiq5m4/vudisefabetodol.pdfIn PDF document text
    • https://flyags.com/editorResources/file/%5C/bupevifurebefugujisa.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/9307fd468b41e29daa5a13a429aae031/ledobalatofafuxerini.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cda97acd28---viwosinipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EC 5772 bytes
SHA-256: 600958036898d2139e99c1f483f3343e42f92434f4d99677ad336837214b4488
font_01_sfnt_off0000dd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD64 4960 bytes
SHA-256: ee8fd9ed8e5bf7da9bd42326182ef702376607dcdb030a2de6aea39f50eeeef4
font_02_sfnt_off0000ed50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED50 9960 bytes
SHA-256: 716323159693887c2d075b0d505764fac117b15affa9104598cb942b8d99a1e7
font_03_sfnt_off00010fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD2 3776 bytes
SHA-256: 505eaebd9a67a7099d64d8ca40b3a15444bacbe4995c5592909464105b7bcddc
font_04_sfnt_off00011e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E56 4200 bytes
SHA-256: 670080e5a798a0532369fe539cb04aa4d572f76506472896a693a18f38aefa42

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