Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8d044710c484de…

MALICIOUS

PDF

91.5 KB Created: 2021-04-04 00:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f88f4c3cc03c72761705d9af14620dd2 SHA-1: bb56f2b79212e92f0a2707501ea356a929b63ae9 SHA-256: 2a8d044710c484de7b393f2cb79b034490f259ec87768d6682e2c5918712f266
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://soxebez.ru/123?utm_term=bruce+lee+movie+songs++please PDF link annotation
    • https://togoxijagujeg.weebly.com/uploads/1/3/0/7/130775712/konenijalo-gexakew-vetigariso-dexonido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401971/normal_603e1ca79ab47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_603b4c4c3e814.pdfIn PDF document text
    • https://kavavori.weebly.com/uploads/1/3/4/0/134012315/kejaditezuroroda.pdfIn PDF document text
    • https://dowawanezezezo.weebly.com/uploads/1/3/1/0/131070762/616090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387713/normal_5fc6ba28bb94d.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/hhjcjgi/ferogudolotidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_6017b0e0d3fd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454056/normal_5febf3828d86f.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/5igjgec/cnc_tool_changer.pdfIn PDF document text
    • https://dorinupunariwuw.weebly.com/uploads/1/3/4/7/134716439/8899370.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://borobosen.rf.gd/lovalidiniguzasure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c76158-2b51-4e5c-9c1d-29751fdde26c/what_is_the_suffix_ly.pdfIn PDF document text
    • http://tininababa.rf.gd/57934199101.pdfIn PDF document text
    • http://pibufesoxol.epizy.com/xufufitolutexozori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f22c3d-da0f-488c-8942-95e0112de85b/2004_dodge_ram_1500_5.7_fuel_pressure_specs.pdfIn PDF document text
    • http://satekivu.rf.gd/how_to_reset_tp_link_extender_ac2600.pdfIn PDF document text
    • http://xutakubu.epizy.com/dogifapagadoponikewagokod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d606b7-c567-4961-b9f0-1be29c900363/geralds_game_summary_spoiler.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_off00012823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12823 5360 bytes
SHA-256: 0e01c0474e33a50362e3e21aafa82b893d1e5b1f35a911276208b39318f6f146
font_01_sfnt_off00013a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A50 11284 bytes
SHA-256: dccc1e6a546bd676c1f0b1cb23f30374fc83b5696b6c2778e2edeb385dc24381

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