Malicious PDF — malware analysis report

Static analysis result for SHA-256 871133f4c2f81751…

MALICIOUS

PDF

81.8 KB Created: 2021-05-02 15:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43f0cf8e55da355786b6f5185a946f1e SHA-1: d210e2f167c10b93b0e79430600c52ccd85dc513 SHA-256: 871133f4c2f81751efa26165a4329a197dee983155fcca75d3b2a3b4f91e6b14
156 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 are hosted on dynamic DNS services or free hosting platforms, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/strik?utm_term=honeywell+r7284u+hard+lockout
    • https://moxamegok.weebly.com/uploads/1/3/3/9/133999551/gigagug.pdf
    • https://sezebotari.weebly.com/uploads/1/3/1/6/131636698/lanevojuzula_gesovas.pdf
    • https://fuxupetuvifa.weebly.com/uploads/1/3/5/2/135298555/xadugumono.pdf
    • http://feyakast.online/power_book_2_season_1_episode_10_recaplzdlq.pdf
    • https://rigavimiba.weebly.com/uploads/1/3/0/8/130814992/526031cc.pdf
    • http://meetchat.space/nuxaxarenidiwm91cd.pdf
    • http://jetavof.sportsontheweb.net/l_alchimista_libro_gratis.pdf
    • https://xisedemagi.weebly.com/uploads/1/3/2/6/132681548/9250422.pdf
    • http://xilenemivagola.mywebcommunity.org/10935066718.pdf
    • https://mufiguxibetifo.weebly.com/uploads/1/3/1/6/131607440/takof.pdf
    • https://nasotatuji.weebly.com/uploads/1/3/4/3/134392375/ruzika_rexadu_jovotejuz.pdf
    • http://dokukuke.mypressonline.com/what_technology_appears_on_the_royal_standard_of_ur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vidugozu.atwebpages.com/conjunction_exercise_for_class_7.pdf
    • https://42f4b946-f871-4f2a-a73e-6571c6569919.filesusr.com/ugd/e20521_4ac55c7c9d224a7e8d8ac2dd58aa6cd2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fa07ef39-96a6-4fd1-a741-a6a69fcad941/el_ser_uno_libro_6.pdf
    • https://uploads.strikinglycdn.com/files/ff0a49c6-bba8-4116-b4b1-8e0566f4372d/fofukuboniruxo.pdf
    • https://uploads.strikinglycdn.com/files/ded5ccb3-ee4b-4640-960d-2a56c8f15849/line_6_reviews.pdf
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_ec0d76d68b444a259cd2d8f9e6e4ae1d.pdf?index=true
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_9608d25f17a54841be2c625356e05d5f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c2fa047f-4869-4b54-8dbe-7885a9054c6c/remagilaposasuwu.pdf
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_d9d54d47301b4c4b9d14583a36125e88.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e5141f3a-64bd-4423-9c35-ed6c1d29455c/dometic_awning_manual_override.pdf
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_1e5a6e6ea5d04e48b866c76a3e488ad3.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_off0000ff37.bin
133c15efbf53094f7a74cf8ae1d313225609ea7f56f8702f7b3b01510ea32bb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF37 5560 bytes
font_01_sfnt_off0001123c.bin
df5baa04de94557b591bc6c537557cc8659d2a58fb9bcc53952163c37c7d63ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1123C 11620 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.