Malicious PDF — malware analysis report

Static analysis result for SHA-256 564ca0f4503d9611…

MALICIOUS

PDF

81.2 KB Created: 2021-04-01 04:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7d7ab4a614e07c10f942a27d8b11bca7 SHA-1: 6b3c75028d7ee85fd92a62b883e87edcc1b91536 SHA-256: 564ca0f4503d9611580b4efde63aaabaab20a1fb86c0571ef266188b2ee6bebb
164 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 presence of numerous external links, including a large link farm, suggests a phishing or SEO poisoning attack. The 'Fake invoice / payment lure' heuristic further supports the idea that the document is designed to trick the user into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://mezovuduw.ru/wix?keyword=outlaw+paintball+gun PDF link annotation
    • http://kogutojoveso.mywebcommunity.org/pairing_mini_jambox_with_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/gOjhhaD/summoners_war_ehp_calculator.pdfIn PDF document text
    • https://wogalipa.weebly.com/uploads/1/3/4/3/134316604/8af03c.pdfIn PDF document text
    • https://cdn.sqhk.co/xukigipeduve/hcjgcl2/ximedu.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/como_consertar_um_fone_de_ouvido_da_apple.pdfIn PDF document text
    • https://cdn.sqhk.co/mitebosareki/ahghjhf/38269828759.pdfIn PDF document text
    • http://sotarebesowula.medianewsonline.com/94265196609.pdfIn PDF document text
    • http://fomijegi.mypressonline.com/is_blogging_still_profitable_in_2020.pdfIn PDF document text
    • https://ganegekisawaji.weebly.com/uploads/1/3/1/4/131406809/javof.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/ihggYRv/snowmobile_trail_groomer_weight.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/ehcjcMj/lurusit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gosete/saxagudazejotolosuxumum.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/94061644074.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/kamchatka_guided_tours.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/hd_video_player_for_computer.pdfIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_aabbf32ec9d74c9a91e60a718d89791b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jevelel/651956101.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/attack_on_titan_season_4_dub_release_date_australia.pdfIn PDF document text
    • https://88e92b2d-3ddf-41b2-a2ae-4af48bfba274.filesusr.com/ugd/b74686_1c79a420d69e415b8175c5b518a27ce8.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A1 4972 bytes
SHA-256: 7d565f7d2e7d7128271c815c290e92ea8970b82261b176861b950d135c8eb8ba
font_01_sfnt_off0000f6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AF 11848 bytes
SHA-256: 5961c027dbd327d936f9ba516156b747600b8e5605cbd2be16065880ea6a7ead
font_02_sfnt_off00011e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8C 17160 bytes
SHA-256: a92bab3096eabe516b8601c224730596d96d3c34047544652223caabe10ab9df

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