Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e7772452d343b7…

MALICIOUS

PDF

79.8 KB Created: 2021-03-08 22:51:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1ade3229b80a127573e4e40ac2fb1bfd SHA-1: be4bb487082c6ffa651d49a131893455592c5cd5 SHA-256: 43e7772452d343b7997e14d4ef59abbb20ba7a2c4c07071d6d9e50eb998ccd4b
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The primary URL, 'https://gimoguvi.ru/award?keyword=secured+and+unsecured+loans+pdf', indicates a lure related to financial services, likely to trick users into clicking through to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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.
  • 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://gimoguvi.ru/award?keyword=secured+and+unsecured+loans+pdf PDF link annotation
    • https://zilisekisami.weebly.com/uploads/1/3/1/4/131437354/munogawukujajamal.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/can_a_ninja_blender_be_used_as_a_food_processor.pdfIn PDF document text
    • https://nogonosexenepe.weebly.com/uploads/1/3/4/6/134674491/3e496ff9521f7d4.pdfIn PDF document text
    • http://figuxovutofid.mygamesonline.org/63768540369.pdfIn PDF document text
    • http://arthromedshop.xyz/60694232293fa6cx.pdfIn PDF document text
    • http://piredvizhnik.com/57944659914x3kam.pdfIn PDF document text
    • http://xsale.trade/france_simulator_2_mod_apk_revdl1njog.pdfIn PDF document text
    • http://bewizasosu.sportsontheweb.net/how_he_loves_me_lyrics_jesus_culture.pdfIn PDF document text
    • https://bozixezexa.weebly.com/uploads/1/3/4/8/134861503/dizininowepokirome.pdfIn PDF document text
    • https://wigadanoj.weebly.com/uploads/1/3/4/4/134404864/1948987.pdfIn PDF document text
    • http://changepass.online/wes_anderson_screenplayh5fib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_a0757c96881744d390edb4a26c7a9ad0.pdf?index=trueIn PDF document text
    • http://medazupu.onlinewebshop.net/verijasivalasaxidijulut.pdfIn PDF document text
    • https://729282ec-1290-4cbc-9302-cf8a24acd4c7.filesusr.com/ugd/42c189_54786c3a08554ee9b66e6b7d3d07ccc2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b01e5c3-a32d-4408-8851-f3a56aa9aa03/shure_ulxd4q_digital_wireless_receiver.pdfIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_ae27860862cc444c8f3ef36d6c7e40ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/dragon_city_breeding_sanctuary_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/ledejapaxinawaguvar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a9e4b0f-34b0-436e-beb7-189f51a96d69/24631657788.pdfIn PDF document text
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_10a6e957cce549ceabb4d2e105d90a58.pdf?index=trueIn PDF document text
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_72639154439a4f2c9bb67b34ccfd83d4.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF50 5004 bytes
SHA-256: da08cb44f2f26464f45506dc9028c731fad790168a098c532700fa8d94373c6e
font_01_sfnt_off0001004e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004E 10368 bytes
SHA-256: 715d2e178b6b32d129e8064d044ab56c19e1230536c570ebd89c32d379944068
font_02_sfnt_off000123ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3