Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d074237038b6732…

MALICIOUS

PDF

79.0 KB Created: 2021-03-17 16:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70755a2850ea7084b4ff4c3cf0274a48 SHA-1: 207f413e76ea7cc337615bc02e85f608fa5a3a57 SHA-256: 3d074237038b67325e99f5dfca46ea0cd4bdc143e1322fa5d37a4bbc89f457d2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically targeting a search for 'imei changer apk full'. The presence of a large link farm and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent to redirect users to potentially harmful content. While no scripts were directly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=imei+changer+apk+full
    • http://puzexijabin.mypressonline.com/39778552019.pdf
    • https://cdn.sqhk.co/kawurefeki/YGX1ibC/vigosir.pdf
    • http://kaxiwemusemoj.mypressonline.com/87553274118.pdf
    • https://cdn.sqhk.co/nibedogoxov/DrChd8j/zowep.pdf
    • https://cdn.sqhk.co/govovazeket/hiigghj/brexit_withdrawal_agreement_summary.pdf
    • http://gamowenugeg.sportsontheweb.net/faribuvunoverozofapanev.pdf
    • https://cdn.sqhk.co/nogorodizet/pXhiiit/nedawijiregavuwubenaji.pdf
    • https://cdn.sqhk.co/winexumalov/idialjb/77152219479.pdf
    • http://kirudikegopoded.sportsontheweb.net/can_disney_plus_be_added_to_roku.pdf
    • https://cdn.sqhk.co/wafifovuwel/jahjrha/keyboard_change_keys_windows_10.pdf
    • https://cdn.sqhk.co/puwukuwos/tjhEjho/amazing_facts_doug_batchelor_bible_study.pdf
    • https://cdn.sqhk.co/kikepedu/gjCGsyK/xagilulodofafuporew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wurivuve/65594009638.pdf
    • https://s3.amazonaws.com/nawosineromigi/anniversary_cards_free.pdf
    • http://gakamaxoluzes.atwebpages.com/bafimesojome.pdf
    • https://uploads.strikinglycdn.com/files/743b6a22-dd7e-4fb3-b4a5-80c3c13f5107/juton.pdf
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_9caab2fdb938408ea9f47c84881be47a.pdf?index=true
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_ad2f5f4fde074df7b7ff9423bdd47220.pdf?index=true
    • https://59b17237-83b3-47c6-9d40-f547da5b0434.filesusr.com/ugd/827194_c8c2c6f2a7a24fe9a40824c52465214d.pdf?index=true
    • https://s3.amazonaws.com/womirofop/calligraphy_alphabet_letters_guide.pdf
    • https://s3.amazonaws.com/nutanigonu/burger_king_veggie_patty_ingredients.pdf
    • https://uploads.strikinglycdn.com/files/6edd6657-a275-4c9c-b9f2-b5725f90c268/4488530965.pdf
    • https://uploads.strikinglycdn.com/files/ef48ee05-7225-49a0-8554-aac587f131b8/61444306086.pdf
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_b3e033b3cf67460e95e4addfbff45e76.pdf?index=true
    • https://s3.amazonaws.com/xilasisefi/61578123555.pdf
    • https://uploads.strikinglycdn.com/files/df96ae8d-cbfb-460a-a9af-d5b65cfe3d6c/31128492965.pdf
    • https://uploads.strikinglycdn.com/files/6767c99f-4679-4241-aea3-0e87c609802f/63417780074.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b1.bin
80f305c367c96ccf8ad79df2afb3908c6cfd2153ee293c57b6ac358c9b6ae377		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B1 5252 bytes
font_01_sfnt_off0000f760.bin
1cbd5a059d31da48cd988d42bac7d6bf2ff2b4a7f93f4a03cf7258c164c301e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF760 3280 bytes
font_02_sfnt_off00010338.bin
2a545c76c7fcd2fe6de8cf10410537bca20f712e97f86d249ee59f27d9537204		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10338 13896 bytes

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