Malicious PDF — malware analysis report

Static analysis result for SHA-256 6963b5be97e99cba…

MALICIOUS

PDF

81.7 KB Created: 2021-03-15 18:33:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bcf2172221e226ce6cfd9483b945b7b SHA-1: 9d273c099d104428dfbbf49e92c83f223a87ad64 SHA-256: 6963b5be97e99cbaf6df59bf87ee9ed07c1095586e4a227bf2c03cdd783f6940
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://druttle.ru/award?keyword=biogas+plant+in+pakistan+pdf', is designed to appear as a search result. While no scripts were explicitly extracted, the PDF structure and the high number of embedded URIs indicate a strong likelihood of malicious intent, potentially leading to phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/award?keyword=biogas+plant+in+pakistan+pdf
    • http://sevezor.scienceontheweb.net/87221124248.pdf
    • http://bexowobiminefi.mywebcommunity.org/how_to_use_resistance_bands_for_arms.pdf
    • https://cdn.sqhk.co/jusulikipe/jjfgelP/33059888893.pdf
    • https://cdn.sqhk.co/sovebiba/hhuTgeh/advertising_agency_success_stories.pdf
    • http://setafugeridol.scienceontheweb.net/tupadimed.pdf
    • https://cdn.sqhk.co/lilapanorup/y0k1mhj/6474744059.pdf
    • https://cdn.sqhk.co/muxaferamet/KkwXjj4/true_football_national_manager_2019_apk.pdf
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/zozibubokixi_fizugimunez_rosapefe_parotif.pdf
    • https://pajejasebuwosiw.weebly.com/uploads/1/3/0/8/130813778/9020691.pdf
    • https://cdn.sqhk.co/wusuzevomo/Vghhbhg/47409021862.pdf
    • https://jafipununevov.weebly.com/uploads/1/3/0/8/130814040/xoxefe.pdf
    • http://maxobujixeweden.sportsontheweb.net/baixar_carrie_a_estranha.pdf
    • https://cdn.sqhk.co/gufemazibafi/ierNjd5/24191504240.pdf
    • https://cdn.sqhk.co/dasofuduveje/dhiaxgh/mofuj.pdf
    • https://nixawajumumija.weebly.com/uploads/1/3/4/3/134338940/loluwavazu_vexoluwufulibid.pdf
    • http://zakosemej.mypressonline.com/89736295171.pdf
    • https://mawurimi.weebly.com/uploads/1/3/4/6/134661678/dfa314.pdf
    • https://cdn.sqhk.co/tezakagadol/9TifGjb/n64_emulator_online_multiplayer_android.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bopuxosavubare/dolphin_emulator_for_android_5._1._1.pdf
    • http://naburonip.myartsonline.com/asp.net_mvc_302_redirect.pdf
    • http://nabenejajoko.myartsonline.com/how_do_i_program_a_comcast_remote_control.pdf
    • https://s3.amazonaws.com/woxewiwupir/lanuwamumikubuzer.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_off0000fee3.bin
6e4ab16406b79f61de47598bc3717660b03baee441a1ffd08a4b9509538fab46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE3 5228 bytes
font_01_sfnt_off000110ce.bin
f496623fc7b9d8a5222b0aa2d8df638a655bc699266841f08cd0e90cb32b81fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110CE 11476 bytes

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