Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5bbc117cd36d453…

MALICIOUS

PDF

98.6 KB Created: 2021-03-26 10:18:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e8b6fceb253fb38c89de739ce9c57063 SHA-1: 607b96e19872f1eccbeb993bcdac9e293fa84aa2 SHA-256: d5bbc117cd36d4532255c7b48870e1c8ea7ab4da90380bc10e5fcb2f75e63cff
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it's part of a link farm designed to drive traffic to potentially malicious or phishing sites. The document body, though heavily obfuscated, contains keywords related to guides and applications, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • 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.
  • 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://botokaw.ru/wix?keyword=grand+summoner+leveling+guide PDF link annotation
    • http://bottlechainworld.com/1479715150909t6.pdfIn PDF document text
    • https://cdn.sqhk.co/takodabu/NhcsYag/lofobexamazisub.pdfIn PDF document text
    • https://xisuludibu.weebly.com/uploads/1/3/5/3/135300694/8549778.pdfIn PDF document text
    • http://blancer.xyz/hungry_shark_world_hack_ios_apkz7lak.pdfIn PDF document text
    • https://cdn.sqhk.co/towojutal/fibCmhb/winariduzipavu.pdfIn PDF document text
    • http://alex-chekalev.com/formation_informatique_video_gratuitxb2bk.pdfIn PDF document text
    • https://geridaradekod.weebly.com/uploads/1/3/1/4/131437552/9ff43734f02ad.pdfIn PDF document text
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/xukix.pdfIn PDF document text
    • https://tuxupurevulivi.weebly.com/uploads/1/3/0/8/130813143/6235734.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/haRmjhz/rewards_program_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/jukunobegabe/ibm24MD/mifujotonazigununevaju.pdfIn PDF document text
    • https://wizenavadabavor.weebly.com/uploads/1/3/4/5/134518239/xofikimufetezutumol.pdfIn PDF document text
    • https://cdn.sqhk.co/joraxeneli/ghidiap/instagram_app_for_pc_without_bluestacks.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaead7bf-1d8f-4327-9f82-07ebd93647ce/why_cant_you_use_carbon_14_to_date_rocks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a23e603f-acd0-4580-b8d7-ba33b0ad7db5/tedevakerapodomoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66909520-530e-43d3-94e6-6b1070f2793e/96830741383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdea0712-a47a-45c0-ad37-887f3ea55820/37336325852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b00151-14c2-4848-b9dd-ac7533e15efc/what_are_test_specifications.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/portico_bedsheets_online_shopping_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59a2b777-4378-4af7-bd32-d52fad5d7f95/30855984761.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/how_to_make_your_own_lithium_ion_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/vadinazijupubemufikixas.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/45227843665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a2f43c-0899-43a2-a7e5-80ccb8d4713d/genozuxumutagetosoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce7b83eb-d48f-4077-8f23-1630da003cd4/how_to_reset_check_engine_light_nissan_sentra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10215816-1c8b-45e7-bbd7-df189aba5f1e/how_do_i_replace_the_drain_hose_on_my_lg_washing_machine.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_off000143cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143CF 5236 bytes
SHA-256: 58658336b433696d548a28e40ef939eb5ee899a6407bccbebb81662674da0ec2
font_01_sfnt_off00015593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15593 11628 bytes
SHA-256: 7cae824adba68ce93241e6e7f23648c6c090da81ed65e178ec6cb8bd26b01a07