Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db834273b9c8154…

MALICIOUS

PDF

82.0 KB Created: 2021-04-05 11:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0152943d08f1e02e3246269ae553b4c6 SHA-1: 5d4715b79058e3e2be26b67504bfc5b8319b1e1d SHA-256: 5db834273b9c8154365525b21edc02b9b0409dc3ce583197fa3b7033b6549433
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or SEO abuse tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be part of a multi-stage attack where an archive is protected by a password provided separately.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://fokemale.ru/wix?keyword=toy+blast+mod+apk+revdl
    • http://llloooodddd.space/ghosted_love_gone_missing_season_2_episode_3fn1th.pdf
    • https://cdn.sqhk.co/sudidoxa/YjcYjax/kuledaguz.pdf
    • https://fozivumi.weebly.com/uploads/1/3/4/7/134761275/tetekinokulubu.pdf
    • https://siragakepog.weebly.com/uploads/1/3/4/8/134890789/0b0591.pdf
    • http://idclick.cash/atrocity_act_2016_in_marathi2lc7g.pdf
    • http://beststudent.fun/luketamelodonikudijuxoofucs.pdf
    • http://hurleyshamburgers.com/craftsman_diehard_lithium-ion_20v_max_battery_chargere0p12.pdf
    • http://meinekarten.best/how_to_open_a_liftmaster_garage_remote3kic6.pdf
    • https://cdn.sqhk.co/felodunom/ajchjjf/how_to_light_up_balloons_with_glow_sticks.pdf
    • https://kixifosesezor.weebly.com/uploads/1/3/3/9/133998007/7963139.pdf
    • https://xulewanexu.weebly.com/uploads/1/3/4/1/134108589/aca1c5ee933.pdf
    • http://texno3ua.com/kenmore_665_dishwasher_reset66lmc.pdf
    • https://cdn.sqhk.co/kosojilufut/ZhjhjdZ/furam.pdf
    • https://cdn.sqhk.co/zibomevuguli/eibwFjg/likiwowazadojopunuge.pdf
    • https://sigiduba.weebly.com/uploads/1/3/1/3/131384121/fesusufo_supepukora_dokigelidaka.pdf
    • https://cdn.sqhk.co/dedesonor/cLKHPPJ/zufazomilipakurotaxup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://77ac2d45-d533-4b4b-a85c-01e81860bff9.filesusr.com/ugd/7f1ad7_e674f8f5262b45e7b32724aeb4fc3c61.pdf?index=true
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_eb3807ef6b1f4b44878ff714f73dd4c7.pdf?index=true
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_2d427330c7f744e1b3923471981ae2c3.pdf?index=true
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_a152164eceb740af82e95c60e4959479.pdf?index=true
    • https://09af0a6c-c0e6-47ff-90c1-5b173435ccd1.filesusr.com/ugd/b92b66_46779fb099444f308c1481fc76d36bc0.pdf?index=true
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_31ccbcf8031743b09cd1c59120be9a33.pdf?index=true
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_66a0a4a3218d4a1b9e25f60f78d89262.pdf?index=true
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_f9018bf0b83a44d89d6d499e79650bfe.pdf?index=true
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_c901ca0f20694411bbac1a0e1a1012a9.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5d0.bin
f304e9ec08d76fac9c0ab4d1e3b6f509f69a019f303385d4f29322d16509c125		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D0 5052 bytes
font_01_sfnt_off00010709.bin
1d8d357f2a0e760625195f59c6558d7d4a2ffd8ecc8c9a3c5a51b338cb17a958		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10709 11028 bytes
font_02_sfnt_off00012c6d.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6D 4324 bytes

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