Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede7de5a9ea4e9fc…

MALICIOUS

PDF

70.7 KB Created: 2021-04-06 18:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 05ecd340f061eb87f181e0f552775d31 SHA-1: eddabae4e007b8558cb326976c57379e4110566c SHA-256: ede7de5a9ea4e9fcdd9192560d5616d9715c7f045d1a0b6ffe7895095e78a830
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous external URLs, with one prominent URL being https://pelibifir.ru/strik?utm_term=planeacion+estrategica+michael+porter+pdf. This suggests the document is designed to redirect users to potentially harmful content or facilitate SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/strik?utm_term=planeacion+estrategica+michael+porter+pdf PDF link annotation
    • https://tesegape.weebly.com/uploads/1/3/5/3/135387632/pavusebutumanok.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/d2e4d4e404c41.pdfIn PDF document text
    • http://lajulufubugo.22web.org/63769129087.pdfIn PDF document text
    • https://cdn.sqhk.co/sebuwemid/8idnjcO/58026559378.pdfIn PDF document text
    • https://sikalejewop.weebly.com/uploads/1/3/5/3/135341852/8713802.pdfIn PDF document text
    • https://cdn.sqhk.co/ziriziwebu/chaigA8/nitopafumojezalunekek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414341/normal_60544fd6bc556.pdfIn PDF document text
    • https://wipowoniwosixad.weebly.com/uploads/1/3/0/7/130740259/liwiwenefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421339/normal_5fd96a8134fa2.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/xitut.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/ieHTEuy/easy_toenail_designs_step_by_step.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485696/normal_60637f290bc44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_c6467b64edd04d66ac6aa6ff01dfd82b.pdf?index=trueIn PDF document text
    • https://62bfe9e3-d01a-456c-9d14-3ac71290fd99.filesusr.com/ugd/cfe640_e5160ea8e4ae4147b8c15aa65137bffc.pdf?index=trueIn PDF document text
    • http://guligakifiw.epizy.com/beamng_drive_car_jump_arena.pdfIn PDF document text
    • http://buwijakuwomem.rf.gd/gute_nacht_winterreise_sheet_music.pdfIn PDF document text
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_cf2dbc6410d547ec9d5323f048810dc9.pdf?index=trueIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_f659a333c8d6474d9410abe2e0a7260a.pdf?index=trueIn PDF document text
    • https://ee809a51-a58d-41df-a269-13688c4e1c69.filesusr.com/ugd/5f587b_634c2c456932462f8cdcd5487328dcec.pdf?index=trueIn PDF document text
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_ae965d5a0eb04decbccb9333a91514db.pdf?index=trueIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_199c6fbe74264f27ac67aa208acc7df4.pdf?index=trueIn PDF document text
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_33af61f762504691a9f43855b8218669.pdf?index=trueIn PDF document text
    • http://mekofeju.epizy.com/how_much_horsepower_does_the_2021_mustang_have.pdfIn PDF document text
    • http://gisobugiwe.rf.gd/bakunin_on_anarchy.pdfIn PDF document text
    • https://fefcf4f0-bf52-4086-adb3-b788df03f7bd.filesusr.com/ugd/da9d4c_c55eac1284c04311a8c0a9b36e29a76a.pdf?index=trueIn 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_off0000d621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD621 5568 bytes
SHA-256: 7088c8556863ffb83a5d19f18274369920e6eac4f81e85a8cd4d966278bb283f
font_01_sfnt_off0000e8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E4 10568 bytes
SHA-256: 9553e7b84784d17b2d8a0258771f4d0a479916e5c40f740c973cd4f5140a5e5d

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