Malicious PDF — malware analysis report

Static analysis result for SHA-256 37767648cb3acb24…

MALICIOUS

PDF

76.4 KB Created: 2021-03-10 11:03:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0008ad8d90ef848ca0bc0a3cf41b622 SHA-1: e41babceda99657b4662f02d2cb99f61ce839ab1 SHA-256: 37767648cb3acb24b5bab53331a4024bdb6060ae54d178fcf7ded87cf2002c4f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with at least two pointing to suspicious domains ('botokaw.ru' and 'mir23.xyz') that are likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, suggests a lure related to 'navy seals training'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/aws?utm_term=best+book+on+navy+seals+training
    • http://mir23.xyz/metudaxatelixazuxofo80bvk.pdf
    • http://idslim-italia.site/31158231107c9see.pdf
    • https://cdn-cms.f-static.net/uploads/4473053/normal_5fea3cdb47a7c.pdf
    • http://moymagazin.xyz/finnegans_wake_lyrics_darby_ogill0otkh.pdf
    • https://cdn-cms.f-static.net/uploads/4382618/normal_6032b845a1a09.pdf
    • https://static.s123-cdn-static.com/uploads/4456399/normal_5ff8db855afa1.pdf
    • https://static.s123-cdn-static.com/uploads/4445103/normal_5fed1de534d5e.pdf
    • http://trixy-matrix.space/dabijuruzitekanakepedop62mmo.pdf
    • https://cdn-cms.f-static.net/uploads/4417531/normal_5fe6e8bcc8f09.pdf
    • https://static.s123-cdn-static.com/uploads/4417983/normal_5ff5470cce643.pdf
    • https://cdn-cms.f-static.net/uploads/4383792/normal_604467ffe8b1d.pdf
    • https://cdn-cms.f-static.net/uploads/4408851/normal_5fd966c063a38.pdf
    • http://blaugrana.ru/70269917148o9ohy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://momerizimapunu.epizy.com/93416374001.pdf
    • https://s3.amazonaws.com/vibasujefir/16220504428.pdf
    • http://jejotatimub.rf.gd/77027691607.pdf
    • https://s3.amazonaws.com/tugabijenovili/escape_room_game_answers_level_130.pdf
    • https://s3.amazonaws.com/kezemiradigu/18983939024.pdf
    • https://uploads.strikinglycdn.com/files/93f3ebe7-b8c2-407d-859f-1518c4b5821c/72682836073.pdf
    • https://s3.amazonaws.com/wovugi/international_business_management_subject.pdf
    • http://finedati.epizy.com/plantronics_voyager_legend_b235_uc_bluetooth_headset_with_usb_adapter.pdf
    • https://uploads.strikinglycdn.com/files/935d5db9-f385-42d3-92f2-a2c49dc63f76/fidasuzuwe.pdf
    • http://tiwufuwivuvuf.epizy.com/the_vampire_diaries_season_8_episode_16_trailer.pdf
    • https://s3.amazonaws.com/tofizo/golagavumotokaloxujorelog.pdf
    • 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_off0000ec37.bin
f6c2e0be374859883072a5b72a8b468e021c7987fbc1a6362b8c07af69393dd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC37 5268 bytes
font_01_sfnt_off0000fe44.bin
60b3aaadc5acb0633c0ec47cfc1e9cf3f8f21cedc7fb52b926d7ce51e1ae7ecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE44 11060 bytes

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