Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a6f64ea45ac616b…

MALICIOUS

PDF

92.8 KB Created: 2021-03-06 00:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ee63e81f69605d48aacf6d14a55d9789 SHA-1: 58c2031c1c1fd5a0c781bef5f1a4199b2f00a1bc SHA-256: 2a6f64ea45ac616b5f7e99035c72b6a63ec2c92a3c93daa7e744ec03688e8ac5
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains or are used in a link farm strategy. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam. The embedded URLs suggest an attempt to redirect users to potentially malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://golowaki.ru/strik?utm_term=kenmore+90+series+dryer+belt+diagram PDF link annotation
    • http://reduslim-siteofficial.site/ludo_star_2017_apk_download_for_pcdtykr.pdfIn PDF document text
    • http://worldhold.online/the_fall_of_the_house_of_usher_summary_and_analysis5wd9e.pdfIn PDF document text
    • https://figedojopijobe.weebly.com/uploads/1/3/4/7/134769561/teloj.pdfIn PDF document text
    • http://spain50off.info/do_portable_dab_radios_work_in_carsolxce.pdfIn PDF document text
    • http://orbitan.fun/most_aggressive_badgerrrbgx.pdfIn PDF document text
    • https://vamewufu.weebly.com/uploads/1/3/4/3/134317042/kotilimimo.pdfIn PDF document text
    • https://tivuwamivubi.weebly.com/uploads/1/3/5/3/135384825/garureru-rifavexu.pdfIn PDF document text
    • http://betmoy57.com/eaton_13_speed_transmission_fluid_capacitybfba0.pdfIn PDF document text
    • https://moliveje.weebly.com/uploads/1/3/5/3/135323163/xonumu_putipenelofufox_mejunopuxof.pdfIn PDF document text
    • https://gobodozi.weebly.com/uploads/1/3/1/3/131398455/sekiwuwebumes.pdfIn PDF document text
    • https://sizomejuxitiz.weebly.com/uploads/1/3/4/7/134748976/3dd6631ae0919.pdfIn PDF document text
    • https://tilivugex.weebly.com/uploads/1/3/4/1/134108965/jojilezo-bidijir-tamezugejifibuk-wokiv.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/618511352611w922.pdfIn PDF document text
    • http://ehaberdevlet.com/653008635165fcm8.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://uploads.strikinglycdn.com/files/9e1e1600-f1e1-435e-99f7-ccdb4c232dcb/bakofetosazokurupiwojizog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/604cde7b-e350-4b89-ba0f-36185f71dc43/49379056704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eddc5dc-e744-4bfd-9ffd-9096d2fbc456/pajonovazijixizoletuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38ee493-7b47-4d00-a89d-a258f57664f2/wegafewerikav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b24977d6-3207-4a13-9c10-f414a7e1013d/67981856069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98081598-9e0f-4a5f-a5ed-6c4b0f2964fb/32389857245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a569389-41e2-453a-af8f-9004e2a1d77c/todas_as_formulas_de_geometria_plana_e_espacial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91fbdfac-e0b2-404b-90a1-4ab464755e4d/sonic_drive-in_restaurant_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1350549e-1469-44ce-9355-786cbd165abb/xererexifepen.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8D 5440 bytes
SHA-256: 8ec77d0de9457b1a07027a6def80cb24f80a94e3b6d1d3b026ab62c11d784385
font_01_sfnt_off000130f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F2 11296 bytes
SHA-256: 4923216e843123b58fa3080a2d237f910be13f81fbad056340214a6fc1b5a021
font_02_sfnt_off00015780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15780 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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