Malicious PDF — malware analysis report

Static analysis result for SHA-256 9774d820147463f8…

MALICIOUS

PDF

78.4 KB Created: 2021-03-18 19:42:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f725a5c6e02b7c4c862e708caeb6dac8 SHA-1: bbb50d7ae03cd762a0418c7a6fc60bf2cfd1658b SHA-256: 9774d820147463f89d9cb3d09a1b7df6dcdfe5192baa086539c0887ec9b5104c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', pointing to various domains including 'gimoguvi.ru' and 'weebly.com'. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/wix?keyword=fsx+777+8+glass+panels
    • https://gusijanuvo.weebly.com/uploads/1/3/0/8/130874241/wuxovotekunonu_negaz_wezifij_risexosak.pdf
    • https://static.s123-cdn-static.com/uploads/4403948/normal_6003b3dac39c0.pdf
    • https://kazimiposaduvab.weebly.com/uploads/1/3/1/1/131163956/nutarijoku-vokuzozidarurin-bilevexabiru.pdf
    • https://vanazufir.weebly.com/uploads/1/3/2/7/132740694/modas_lofakotoj_naxuxi.pdf
    • https://pedodexojur.weebly.com/uploads/1/3/0/7/130775447/gudiluxod.pdf
    • https://cdn.sqhk.co/xuzalolotagi/cOxiqgg/carrom_board_shop_near_me_open_now.pdf
    • https://cdn.sqhk.co/latipizi/Jie91iv/diners_club_card_login.pdf
    • https://cdn.sqhk.co/texekikevow/bjfDgjC/hexavalent_chromium_osha_fact_sheet.pdf
    • https://cdn.sqhk.co/wufevinek/CM4Ijjs/wubozulivinazupijisaze.pdf
    • https://cdn-cms.f-static.net/uploads/4415936/normal_5fd9f48a1a763.pdf
    • https://sevimuxeso.weebly.com/uploads/1/3/0/7/130739978/kegetepufede-bomelugaf-lubomozusofux.pdf
    • https://nuzoligul.weebly.com/uploads/1/3/3/9/133997434/setomewuwekiwa.pdf
    • https://cdn.sqhk.co/koxixoneto/vwggjee/slack_careers_new_grad.pdf
    • https://cdn.sqhk.co/nivipanevi/6Lkgdal/jovovogidezis.pdf
    • https://cdn-cms.f-static.net/uploads/4469126/normal_6044674a1691e.pdf
    • https://cdn.sqhk.co/xedogigiloli/ediaZ61/pitbull_dog_food_recipe.pdf
    • https://gunisuzafi.weebly.com/uploads/1/3/4/3/134311694/2240143.pdf
    • https://cdn-cms.f-static.net/uploads/4387406/normal_5fd3beec89b8f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/3e2d6ed0-d92a-4ec0-978b-0a503b4fb8d9/nagirox.pdf
    • https://uploads.strikinglycdn.com/files/517b7c33-f387-4783-b295-7d5e6a835fe0/lazupisiluz.pdf
    • https://uploads.strikinglycdn.com/files/c7f6bfe5-9b34-4cdf-b196-e77403e881dd/56657046232.pdf
    • https://uploads.strikinglycdn.com/files/6b9db4ac-d1c5-4e7f-a83a-0e4a42cf34d1/5141821557.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e788.bin
238742691879bb821db3ceb1c718176531bde5d8b3be2a704742d2ef34f54164
pdf-font-stream PDF embedded font (sfnt) at offset 0xE788 4736 bytes
font_01_sfnt_off0000f7ae.bin
9a40348aac91c0ad908b082c17197a868cb50e47f55d4f2c18e2bf3dd763765c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AE 11340 bytes
font_02_sfnt_off00011e73.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E73 4324 bytes