Malicious PDF — malware analysis report

Static analysis result for SHA-256 d65efbf6503a703b…

MALICIOUS

PDF

82.8 KB Created: 2021-03-12 02:23:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b187bf4808fa43ec99fecd52f736b8fa SHA-1: 2477365610ff5c46f03583ecad34ded27278f2aa SHA-256: d65efbf6503a703bc9a0a768fdc8c72884a58c9c785cf46802189b88c0416907
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains a lure for a government scheme ('Gramin awas yojana up online form') and includes a mass of external links, many hosted on disposable domains, indicating a link farm for SEO manipulation or phishing. The 'SE_MFA_LURE' heuristic strongly suggests the intent is to harvest credentials or abuse multi-factor authentication. While no scripts were directly extracted, the PDF structure and link farm behavior are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://baarspo.ru/123?utm_term=gramin+awas+yojana+up+online+form PDF link annotation
    • https://cdn.sqhk.co/rodofusavivi/jdhfhfQ/.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/65UeMjc/sakataripedibup.pdfIn PDF document text
    • https://cdn.sqhk.co/tunaluvum/tjg6ghu/dinosaur_simulator_roblox_codes_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/porekige/BGjdkjb/72279044813.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/jjhiS16/kik_friends_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ac614e2c-2e00-43e4-a80f-2c6bce9fb64b.filesusr.com/ugd/f103bb_69e3dca014b4491dac0fd2e1ab5afe7a.pdf?index=trueIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_ae40b67b2be64962a8fdd37d4580c24c.pdf?index=trueIn PDF document text
    • https://d1b33a7b-cde1-45d4-bc15-d4d3b6236ac5.filesusr.com/ugd/1d64af_e2512e8bdda84349ab178d29041d1841.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c35cd5dd-831e-4561-9ae5-ffe474031398/68757199401.pdfIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_d71a39659ae24316ba3f999daac145c1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6bfe6c0-3b88-4664-bfb1-3e4bd64136b4/why_wont_google_maps_update_my_location.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_0a4cd52850de4e21ad4d7671deae1681.pdf?index=trueIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_9066cdf7adca4667996b6722d2eb2095.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/96701096-8aee-4aa5-8941-8caf126cbd98/what_are_the_methods_of_teaching_social_studies.pdfIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_710f3c16cdfd402abee3330ffc44ff37.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe15429c-92c3-4246-9a50-8c8405ec5b9b/vuxefovaletuduji.pdfIn PDF document text
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_6aa16d37822149508a47e549f2404dcb.pdf?index=trueIn PDF document text
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_047ba47b1db34f37869094dd2b317792.pdf?index=trueIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_be32b1d423d7450db5fba2fc6891b0bb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/60961696-8e3c-45f6-b8e2-9ec455cfe8ef/dadiwuve.pdfIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_76993c6782e9444cbac30725fe7ff384.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/49dca9f8-6e63-4cfe-a9fb-08fa34e291fe/define_direct_and_indirect_band_gap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b30327-812b-4240-979d-a12fa4918d04/2006_chevrolet_malibu_maxx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12e30ffd-75c4-4e3d-88c9-696532cbdf84/writing_quadratic_equations_in_standard_form_examples.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CB 5348 bytes
SHA-256: 6efa6ced93bb24ac0fa73a7e114f0d1f01c80f1f1e53bfdead6e13c35c1d5abe
font_01_sfnt_off00011602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11602 11816 bytes
SHA-256: ce83146ace5d0272da9f3c612976924cb4e32c9a97b2dc27794c370093616ad0

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