Malicious PDF — malware analysis report

Static analysis result for SHA-256 260be1e95aceab52…

MALICIOUS

PDF

118.7 KB Created: 2021-05-25 12:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47c560e7aaf5326b997c607526860517 SHA-1: 7c5ac8a828ae3cf00c2964822f4eeb68eb88069f SHA-256: 260be1e95aceab528a0108b532ac5a179b5bcb87f3372ab79fb90bddec6ff1b3
164 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 SEO-themed, suggesting a link farm or content redirection strategy. The presence of a URL pointing to 'seumenha.ru' with a movie download query, combined with ClamAV detection as 'Pdf.Phishing.Trojan', indicates a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • 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
  • 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://seumenha.ru/strik?utm_term=filmywap+2018+south+hindi+movie+hd+download
    • https://cdn-cms.f-static.net/uploads/4417536/normal_603281b083376.pdf
    • https://cdn-cms.f-static.net/uploads/4377113/normal_603829daa39ee.pdf
    • https://static.s123-cdn-static.com/uploads/4391327/normal_5fcf2b2d15264.pdf
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/xuzari.pdf
    • https://static.s123-cdn-static.com/uploads/4410431/normal_6007a15ce7767.pdf
    • https://static.s123-cdn-static.com/uploads/4371240/normal_5fc763aeeebbc.pdf
    • https://pawomasa.weebly.com/uploads/1/3/4/7/134737305/22714419b7a2b.pdf
    • https://jonenatone.weebly.com/uploads/1/3/1/8/131872225/3055433.pdf
    • https://koruguliduni.weebly.com/uploads/1/3/4/8/134896859/xajejefapipip-xomevuzijitowen-jirewede-zasupe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vebenok/cyberpunk_2077_ps4_release_time_pst.pdf
    • https://uploads.strikinglycdn.com/files/804aef6d-897b-4597-b8ef-635100b0fe77/attack_on_titan_anime_original_ending.pdf
    • https://uploads.strikinglycdn.com/files/ee08114b-a944-482a-a57e-6b9944bf99c5/how_to_stop_cat_anxiety.pdf
    • https://uploads.strikinglycdn.com/files/e4bd3512-fca5-476e-8873-ebcf4e8fad84/95421560154.pdf
    • https://s3.amazonaws.com/gotitibekovi/92555242819.pdf
    • https://s3.amazonaws.com/ligole/31932923424.pdf
    • https://uploads.strikinglycdn.com/files/37f777b1-95a5-4237-8256-75808f5bfbf1/revesas.pdf
    • https://uploads.strikinglycdn.com/files/71c8e6ae-f8e9-40bc-a326-76ac16abcced/risipelututofaneno.pdf
    • https://uploads.strikinglycdn.com/files/a7853832-818c-445f-bc50-a56dd60e5f0c/37043234613.pdf
    • https://uploads.strikinglycdn.com/files/24de290a-f2b6-4244-ad78-3632fb588783/22706556110.pdf
    • https://uploads.strikinglycdn.com/files/95417990-274d-494b-89ef-9c0c9bdc516c/can_i_change_my_name_on_my_marriage_license.pdf
    • https://uploads.strikinglycdn.com/files/1f2ab47a-da2b-4c65-8c40-6476e565ab44/47177734650.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017997.bin
ac7471831619b5daa0c0b5940b7efe9e37e18cf5cdfedd0dc87a8aea8d252602		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17997 5712 bytes
font_01_sfnt_off00018cfa.bin
4b901072185e861046be14276314799fe0156b4acaf079a2b5b99d0a2912b5f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18CFA 4144 bytes
font_02_sfnt_off000199b0.bin
b6e8b81cb15810070ff49e3202cd1ef377e78eb510b0ac2f1bd49f943e6b4c4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x199B0 10068 bytes
font_03_sfnt_off0001bc00.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC00 4324 bytes

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