Malicious PDF — malware analysis report

Static analysis result for SHA-256 3554b02701508eba…

MALICIOUS

PDF

71.0 KB Created: 2021-05-08 18:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b5befd098fcaf4c99dca89f61aa4ed67 SHA-1: 8785a9985c660426856cc0531b96aa9a0810d10d SHA-256: 3554b02701508eba21c34452cbea5082f1a8b7832b1a36a51cf98b9472cefbb5
206 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/strik?utm_term=kitchenaid+artisan+5+qt+stand+mixer+milkshake PDF link annotation
    • https://tokubarip.weebly.com/uploads/1/3/1/3/131380438/suzimekezazewov-gemubafajawesi.pdfIn PDF document text
    • http://raraveluwogevuw.mypressonline.com/fusion_gratuit_telecharger.pdfIn PDF document text
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/fbda26f.pdfIn PDF document text
    • https://kobizixudowizeb.weebly.com/uploads/1/3/4/4/134402546/fuvesi.pdfIn PDF document text
    • https://cdn.sqhk.co/dawajimet/ZVrEjhv/slow_drum_loops_looperman.pdfIn PDF document text
    • https://ribapapa.weebly.com/uploads/1/3/4/4/134479292/texesu.pdfIn PDF document text
    • https://vujirazezada.weebly.com/uploads/1/3/2/6/132681664/lapip.pdfIn PDF document text
    • http://sivelural.mygamesonline.org/romeo_and_juliet_act_2_test.pdfIn PDF document text
    • http://olipaka.xyz/591525959546tzde.pdfIn PDF document text
    • https://cdn.sqhk.co/pibepufas/NhhNjaU/zixifarago.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/jfLBNyb/21473772776.pdfIn PDF document text
    • http://klokisik.space/hotel_booking_form_ielts_listening_answersgabav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a84be2e-d093-47d7-91ba-409bc4dc8990/45002387942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f400e66d-ba5b-4f85-8aa0-a769a9114662/law_of_success_napoleon_hill_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ed485b0-2daa-47fa-9421-d0c5b0e8b7cb/96495575307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e865c1e-5ed1-4667-bc3f-7886e79ced92/presto_16-inch_ceramic_electric_skillet_with_glass_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12511657-dc69-42e6-8ad2-74e6f449c4e9/can_pizza_be_cooked_in_toaster_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f4fa53-2053-4d6f-886d-aa657e26aaa7/how_can_i_build_my_shoulders_at_home_without_weights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef6c7c1-c259-439c-8916-b9a8deb4e3af/the_dark_tower_the_gunslinger_born.pdfIn PDF document text
    • http://lapetagalelan.myartsonline.com/xawosezakatiwikalebagu.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81B 5532 bytes
SHA-256: f6ca502ceaf0fbf4e9ccb52629672c93b5ae394848f9e058e9ca31ee82aef832
font_01_sfnt_off0000eac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC2 10440 bytes
SHA-256: 74752155ed8b6d4bccc6cbc81b0b6081c02e104d1a5b84cf84b05871568b7653