Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f7d9aa5e6d9bc5f…

MALICIOUS

PDF

70.0 KB Created: 2021-03-15 03:22:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84e1a44cc841eff1a900804ddfaa59b1 SHA-1: b63a49ae784aecfc875db0ba7f5ff5837a874308 SHA-256: 0f7d9aa5e6d9bc5f02233469f6c5d01644b7e219ac26e21259a01091757c7067
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to drive traffic to malicious or deceptive websites. While no scripts were explicitly extracted, the presence of external links and the ML classification strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=art+model+poses+pdf
    • https://rulipativix.weebly.com/uploads/1/3/1/6/131607363/09185.pdf
    • https://topuzuxet.weebly.com/uploads/1/3/0/7/130739133/4de76192d16f.pdf
    • https://tozabofosizo.weebly.com/uploads/1/3/5/3/135340530/monurawibejo_felajubilur.pdf
    • http://akfb.online/why_does_my_phone_say_no_power_at_baseojiq1.pdf
    • http://sosyaltakipcipanelin.com/6762453320ejycs.pdf
    • http://nageramuvepom.mywebcommunity.org/gepakugozi.pdf
    • http://reduslim-italy.site/descargar_tu_pago_movil_banco_bicentenario_apkw0p72.pdf
    • http://lofajemami.sportsontheweb.net/do_pellet_stoves_have_battery_backup.pdf
    • https://wixevilit.weebly.com/uploads/1/3/4/8/134873569/nawux.pdf
    • http://gayerkan.com/julius_caesar_act_1_scene_2_modern_english9sqyp.pdf
    • http://testertumentum.space/102382683483k8qf.pdf
    • https://nekatiru.weebly.com/uploads/1/3/2/6/132695473/6165646.pdf
    • http://boost-shop.xyz/how_to_scan_multiple_pages_on_hp_deskjet_2542j3aig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_830a13552b6c4cc48f6bd8f87152f77f.pdf?index=true
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_afa667774312498297633c2927ccb9cd.pdf?index=true
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_e01b430f9dd144f6ac761ea44900a771.pdf?index=true
    • https://29ce6865-365c-47c4-9f0a-635d6f965865.filesusr.com/ugd/0d6b77_0076cc4c288e493ca96059cd16db9b53.pdf?index=true
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_5ea93b4cabb84679a4f58632b970691c.pdf?index=true
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_fa778949ab654ab795114a67baefc535.pdf?index=true
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_e0ea7f80b2bc4f4380826e40ba4bfc83.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d534.bin
d6fd433aac86d9bdf9c9d719bf233f9e519aaa023f8d009f8e77ce04fc9b4ee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD534 4964 bytes
font_01_sfnt_off0000e605.bin
e9d4d40a323eade81f1135aed79e6aecc01020d3b660926223990545b0bfbd05		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE605 10956 bytes

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