Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd6ad5f205abcf8…

MALICIOUS

PDF

76.8 KB Created: 2021-03-21 09:21:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 7f42429aa5ecffcc0f997f26908d383f SHA-1: a92abbea299730abe0bb09ba9f92ce0dac832f47 SHA-256: cdd6ad5f205abcf87fb92b47ff5db699a8d82d6071bd6f11a94d90d99ef218cc
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous external links, including one to `maypoin.ru`, suggesting an attempt to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

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://maypoin.ru/strik?utm_term=what+are+the+levels+of+measurement+with+examples PDF link annotation
    • https://jaduxokapatusiw.weebly.com/uploads/1/3/5/3/135301375/lakowowe_todezulupeg_koribuxisixifo.pdfIn PDF document text
    • https://kumuxulunewun.weebly.com/uploads/1/3/0/7/130775174/fede3c8f.pdfIn PDF document text
    • http://xusinufazulu.22web.org/caballo_de_troya_6_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403820/normal_6008b7a550155.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467560/normal_5ff911dac5431.pdfIn PDF document text
    • https://vapomawuwe.weebly.com/uploads/1/3/1/3/131398268/tenirudow_woviguk_kitakakal_koxak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385435/normal_604d179322b9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447460/normal_5fee99cdc87f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_5fd61360c70dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_54092bb9f27c4b9394c78900c9d90f94.pdf?index=trueIn PDF document text
    • http://gewuruso.epizy.com/43138058508.pdfIn PDF document text
    • https://ff536187-e25a-4bd2-965b-ff1113cf40b0.filesusr.com/ugd/bfcccc_a419f205159b4beeb82f3980cb1d63a2.pdf?index=trueIn PDF document text
    • http://wagarimorule.rf.gd/carnivores_ice_age_full_free_pc.pdfIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_5bb729a52dcc4bb2802ff7bd37111e3c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0b0a05a-b93e-4c9a-8571-8832a0efd4fc/29672207668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71119dc7-087f-45cb-9bb3-b5af1d524631/33960728918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f86a6d38-c6a4-4f92-89b4-649adf95dba0/gotiwatijixotolove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aeeaca0-3474-45c2-aa57-ad5c0a02912c/35888095672.pdfIn PDF document text
    • https://198d5876-2e36-4a54-a59d-b4c1060b65be.filesusr.com/ugd/4733ca_d852d70a5e474ed9a4675ebfc7cca517.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb6c04a-0e9a-4e0e-8e4c-49b8f0e72ad2/54298157952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df42b489-cf0e-47b3-8340-08aacd769718/48148803637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfb83498-fdb6-481b-9fae-10ef78a3ac31/outdoor_games_with_no_equipment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/038ba497-a8e9-4d8c-a5ea-29f985e41610/tewunepojibum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f869ed4d-315e-407a-a06f-2e53f2a4de53/how_do_i_convert_a_keynote_presentation_to_powerpoint.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_off0000edf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF4 5372 bytes
SHA-256: 115658da2558a08ac527ffcfdfd5d91c515278d08dd531d2bc072f57632bd031
font_01_sfnt_off0001002f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002F 10908 bytes
SHA-256: 4f7820d24ba2688369bf52fa745c16277acd04d26f8f6c3c71ee22eedf1ed531