Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4011757ce14938…

MALICIOUS

PDF

73.6 KB Created: 2021-03-20 22:13:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 726e83f5508ef3701af2d0d0b0fa5733 SHA-1: 86994fa9081d10cd7fb9b2d746b411f99e0ef2c0 SHA-256: fa4011757ce14938cb42e9a28c04f1969a701b87f39a7dca9efbeb892ba00f09
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a tactic to redirect users to potentially harmful websites. The embedded URLs, such as 'https://maypoin.ru/wix?keyword=hot+wheels+lamborghini+5+pack+2020', are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=hot+wheels+lamborghini+5+pack+2020
    • http://fipagolanikobax.mygamesonline.org/tomewidadafiloxekenimek.pdf
    • https://libotavod.weebly.com/uploads/1/3/0/8/130813055/lipafebolorumivewo.pdf
    • https://cdn.sqhk.co/toledexipez/UyRgcha/sigezigivugewowujekug.pdf
    • http://xoroketogejuxe.mywebcommunity.org/gatiwefub.pdf
    • http://pefiworawodud.mypressonline.com/what_is_claude_monet_famous_for.pdf
    • https://fawirato.weebly.com/uploads/1/3/5/3/135392883/b0272932269.pdf
    • http://getfreecreditreport.info/is_total_gym_good_for_osteoporosis926x9.pdf
    • http://azules.ru/best_army_clash_of_clans_th7ovu4a.pdf
    • http://reduslimitalia-oficial.site/how_to_change_mower_belt_on_john_deere_l110l4g1h.pdf
    • http://yachts-4-sale.com/50_inch_tv_with_120hz_refresh_rate61q2g.pdf
    • https://cdn.sqhk.co/zapiseniw/jgeNhb4/48287211619.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_fcf1346e78ce42d7b09375abf12ef387.pdf?index=true
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_82980f95407b48d6957248dfaa24ea56.pdf?index=true
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_baf775b0798a4db985920c629d8ab437.pdf?index=true
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_e8c75c61ad334a12be52c3b710af67f4.pdf?index=true
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_639146477d664366b2b3b94a35b065a8.pdf?index=true
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_84c68815a59941828ff543b19fdfc78c.pdf?index=true
    • https://25f35837-e8ad-4357-b490-8f69bec4165a.filesusr.com/ugd/96c61c_66a9d585ebd44becb4a2e4f423fb6c8a.pdf?index=true
    • 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_off0000d466.bin
4d33a7aede778a140e171a82c75052aeadaca5fdbeb340945f6923f2395069af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD466 6000 bytes
font_01_sfnt_off0000e8b4.bin
246569b5fd7226bd0ebf3c016de7ba0bf82e996896d660a08030b2af0a08efd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B4 1936 bytes
font_02_sfnt_off0000f1f5.bin
c2b3bbc4a29935a18eb7d771484112dc676b51ceb99643a4d3420909c641c307		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F5 11724 bytes

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