Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace6a91da3fdda03…

MALICIOUS

PDF

92.5 KB Created: 2021-03-19 05:36:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 877b1b54568bdac4953878fda2f0993d SHA-1: b01eb942a8fc874ddcf78dac02d0bacc74d5a0e6 SHA-256: ace6a91da3fdda03d159936909f290a26776b879203c6550abed85e270568e55
186 Risk Score

Malware Insights

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

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 0.9991

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://dugedepap.ru/123?utm_term=free+google+slides+templates+science PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388839/normal_6027b43739df2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403563/normal_5ff49f32ce627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_60433dc971333.pdfIn PDF document text
    • https://jitolubupiloz.weebly.com/uploads/1/3/4/6/134637312/xijexugulofi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409405/normal_601e4d0c25437.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/hj2ifdA/83741624927.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/gjgckij/burger_king_open_right_now_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/7jeFhaD/baleadas_con_todo_in_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469831/normal_5fcf9bedb2b84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413578/normal_5fdd06d33c7af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402014/normal_60077803c9578.pdfIn PDF document text
    • https://viliwefat.weebly.com/uploads/1/3/1/0/131069961/zonuvevu.pdfIn PDF document text
    • https://cdn.sqhk.co/bulenupulabo/eXgcpy3/28047637444.pdfIn PDF document text
    • https://cdn.sqhk.co/mitebosareki/18SdKhf/37185024582.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/dCXQ6PB/cod_grilled_recipe_food_network.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/gifcjKg/idle_roller_coaster_hack_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469834/normal_603d6e3f34e62.pdfIn PDF document text
    • https://cdn.sqhk.co/digubamot/gegjODr/rdr2_online_free_stuff_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/98xeWe9/futusadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408330/normal_604dc0f418e90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xidatozekef.epizy.com/south_picture_full_movie_hd_video.pdfIn PDF document text
    • http://suxorodefis.epizy.com/96182539917.pdfIn PDF document text
    • http://laneneloko.epizy.com/6911785283.pdfIn PDF document text
    • http://rajuleneto.epizy.com/machine_learning_algorithms_cheat_sheet.pdfIn PDF document text
    • http://vitixageseda.rf.gd/roxozurupuveju.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_off00012d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D68 5348 bytes
SHA-256: 7e5a399fe4524934afdd9d9abea359bd3a84c241aff79cecf3462e6a13262ce4
font_01_sfnt_off00013f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F84 10928 bytes
SHA-256: 4413dfb78f671613bc6f0259eadfbce7a74f4f478c204d0eee9f668ddbdb4d2e