Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c88d866cc0affd7…

MALICIOUS

PDF

86.9 KB Created: 2021-03-30 15:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f55928de7a0f11833355b3c8d29e083 SHA-1: 921847cb573f038b77bdd0f3e5421da556e6ea47 SHA-256: 8c88d866cc0affd73a88cd50de24008377f5d1d67782bf4ff6d9a4e67d08add3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external URIs, 'https://lozipotod.ru/wix?keyword=onn+remote+ona16av010+manual', is directly associated with the malicious verdict. The document body, though heavily obfuscated, suggests a lure related to a manual, aligning with phishing tactics. The presence of embedded URLs and the overall structure strongly indicate an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=onn+remote+ona16av010+manual
    • http://welitizenowem.mywebcommunity.org/saluj.pdf
    • http://xekalabaxuv.medianewsonline.com/oblivion_guitar_sheet_music.pdf
    • http://juraxoxodas.scienceontheweb.net/33479413379.pdf
    • http://fejukoturig.medianewsonline.com/54599647769.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_f9d27cbf2ac14245ba38d400a27de218.pdf?index=true
    • https://s3.amazonaws.com/wipotegadodorek/how_do_i_control_my_bose_soundbar_with_my_sony_tv_remote.pdf
    • https://s3.amazonaws.com/likadojivivofu/piwalat.pdf
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_514a4a30b6dd420faa18b49e2a6e9186.pdf?index=true
    • https://s3.amazonaws.com/gagagakigibapo/mini_dv_tape_converter_to_computer.pdf
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_3def53fc785c453481856b1764a9b686.pdf?index=true
    • https://s3.amazonaws.com/remuv/mutants_and_masterminds_2e_to_3e_conversion.pdf
    • https://s3.amazonaws.com/wovitiku/rote_counting_1_20_worksheets.pdf
    • https://s3.amazonaws.com/nosepevozux/cataclysm_dungeons_guide.pdf
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_868c74aa8d2a4c20ad48849faf5cb9a4.pdf?index=true
    • https://15822f28-60ad-4492-b8cd-6a7816f4840c.filesusr.com/ugd/7ae8b3_a3005dfd1b9d47089200b04aa5dbded7.pdf?index=true
    • https://s3.amazonaws.com/pululusodogi/adobe_reader_xi_softonic.pdf
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_2be14be3bd8b4eefbafcdd0a62f62e93.pdf?index=true
    • https://s3.amazonaws.com/dozore/ascot_formal_hire_wolstanton.pdf
    • https://s3.amazonaws.com/zoromexemuzid/fatshark_dominator_v2_hdmi_input.pdf
    • https://4bbf79d8-97e4-42de-9a75-948158c354f0.filesusr.com/ugd/52f5d3_aa20514dc4524938924a90bfa3df5bc6.pdf?index=true
    • https://c208ddc4-37ec-4cef-823d-79aeaa8cd68a.filesusr.com/ugd/d34c4d_617be23bf3204cc49feca6072a36222d.pdf?index=true
    • https://94cb5446-44f7-499c-8ddd-8d9df3a2db3d.filesusr.com/ugd/9b9c26_1d965b155e6d41928938bffa221e56dd.pdf?index=true
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_0253b9c07bce4a4da97384ebc3e719e8.pdf?index=true
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_2012e6e6e46b4df98fc0d068b708c255.pdf?index=true
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_09652159dc394958a7cc45c7516a8b50.pdf?index=true
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_322816a62e9a4242a2a75442e28551a3.pdf?index=true
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010044.bin
875249711fbb2fea1b4223e491f2b2a9dd0222ecbdd8289fc9e36e4603cc56cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10044 5088 bytes
font_01_sfnt_off00011179.bin
ff1ae0c285fcca55d6a47c31d58836c89e33ecb748b2b44a8a3dcf0201fccf87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11179 11004 bytes
font_02_sfnt_off000136ff.bin
f2fe1b341ce625982f6229602509497cf1a9423964c663a7c58f6fce8010e377		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136FF 16148 bytes

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