Malicious PDF — malware analysis report

Static analysis result for SHA-256 db2d69fe381d00cb…

MALICIOUS

PDF

76.4 KB Created: 2021-03-09 05:53:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: ea17b22a0e35e33e1e22a427a2c32bcd SHA-1: 14b1697d8ff4a2c73904a91a62caacfcacff04cf SHA-256: db2d69fe381d00cb4cba3f014aebb079774ac4572845b563f08dfd2a0601145d
134 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, hosting numerous URLs pointing to various PDF files, some of which are likely malicious based on ClamAV detection and ML classification. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a deliberate attempt to distribute content through potentially untrustworthy sources. While no scripts were explicitly extracted, the nature of the URLs suggests a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/wix?keyword=dead+ahead+zombie+warfare+apk PDF link annotation
    • https://fifesijewawo.weebly.com/uploads/1/3/1/4/131412558/683f3643.pdfIn PDF document text
    • http://reduslimitalia-official.website/veriguxizorajawere8wpmu.pdfIn PDF document text
    • https://cdn.sqhk.co/nesuxozajek/hi5higg/yokibu_community_speak.pdfIn PDF document text
    • https://cdn.sqhk.co/susopavazane/nFjaigK/wallpaper_broken_screen_prank_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463533/normal_60466c72668d5.pdfIn PDF document text
    • http://triple-doska4.club/33900868497768e7.pdfIn PDF document text
    • http://trastqort.online/sisepilatevajifadudopapbjlim.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/cggw3Qd/fijifopugekunogu.pdfIn PDF document text
    • http://prizinsta.site/odd_thomas_full_movie_online_freeujmff.pdfIn PDF document text
    • http://znohist.site/how_to_adjust_craftsman_snowblower_carburetorwg5uj.pdfIn PDF document text
    • http://hangzhoumetal.ru/broken_screen_app_freev6tld.pdfIn PDF document text
    • https://dutosagow.weebly.com/uploads/1/3/0/7/130775111/biburigonufifipita.pdfIn PDF document text
    • https://xujesosa.weebly.com/uploads/1/3/6/0/136090165/7040571.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/vPFjdjh/toy_soldiers_1_32_scale.pdfIn PDF document text
    • http://mangalvpodarok.ru/how_to_turn_on_simplehuman_soap_dispenserlo71y.pdfIn PDF document text
    • https://furimulu.weebly.com/uploads/1/3/1/4/131411024/e7fc616bf5df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501777/normal_6018ea5c5fb4d.pdfIn PDF document text
    • https://subilitukufune.weebly.com/uploads/1/3/4/6/134629352/kozugurezuse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_6037e01ad616a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418781/normal_6013a50b638ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_60371a75bdb70.pdfIn PDF document text
    • http://xtina.online/35722856313tz8na.pdfIn PDF document text
    • http://byt-upak.ru/55397328350a5ecq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a613b23-01e5-4a71-b09b-aaf5a393e411/63158706537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b7c6ec-2d34-451b-8f28-4c87bbd7d39f/diary_of_wimpy_kid_rodrick_rules_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc80253-2184-45f7-bf78-85a4e9f9b5c9/wosanuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac48a91-a89d-4ad4-b649-634af3a97acb/a_single_man_movie_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61b5ab6e-0246-4e5d-8713-f7c472a6d1f2/zosuzubexipa.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_off0000ed13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED13 5416 bytes
SHA-256: 2d51208d01d7eced0df4fc9451c80a8d263cc18f157909138e6eee0a8e1988c8
font_01_sfnt_off0000ff72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF72 10644 bytes
SHA-256: 56fd209b8df37b806c749265cb066fe38079e601545e2683d69db927317086ff

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