Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e28070aa808f37b…

MALICIOUS

PDF

74.6 KB Created: 2021-01-15 13:35:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 46c57e31320d174b1847d06a176b99cd SHA-1: dbc80165f830eca4e2b64f6835158281b0911b6b SHA-256: 9e28070aa808f37b881f66b787d809d6cbd51ccd749f527604048d98aafca04a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate structure to host many links on potentially untrusted or temporary sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://trafficel.ru/aws?utm_term=swachh+bharat+song++mr+jatt PDF link annotation
    • https://site-1175458.mozfiles.com/files/1175458/pet_doctor_tucson_oracle_rd.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/pegivos_diraxasawu_wibesopaginemub.pdfIn PDF document text
    • https://site-1174838.mozfiles.com/files/1174838/the_norns_in_old_norse_mythology.pdfIn PDF document text
    • https://bezoduremudopez.weebly.com/uploads/1/3/1/4/131437412/wamonuleg.pdfIn PDF document text
    • https://site-1204510.mozfiles.com/files/1204510/kapetedona.pdfIn PDF document text
    • https://fukikabigo.weebly.com/uploads/1/3/4/4/134457586/761796783926fa8.pdfIn PDF document text
    • https://site-1194826.mozfiles.com/files/1194826/6749023674.pdfIn PDF document text
    • https://site-1252473.mozfiles.com/files/1252473/ios_13_beta_6_apple.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451225/normal_5ffd66a237775.pdfIn PDF document text
    • https://tedozumezefa.weebly.com/uploads/1/3/2/7/132740670/difovumilow_resotuwovamifab_pasameja.pdfIn PDF document text
    • https://site-1168218.mozfiles.com/files/1168218/ghost_rider_face_3d_wallpaper.pdfIn PDF document text
    • https:///\/a10.gaanacdn.com\/images\/albums\/36\/1420836\/crop_175x175_1420836.jpg,albumtitle:SwachhIn PDF document text
    • https:///\/a10.gaanacdn.com\/images\/albums\/36\/1420836\/crop_175x175_1420836.jpg,parental_warning:0,isSponsored:0,isAv_ad:0In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xeponodij/physiology_ak_jain_book.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/ethical_hacking_and_penetration_testing_guide_github.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_off0000e350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE350 5592 bytes
SHA-256: 239b87ea15240d0e2b9564896eaec454c052565db391142514fc66026bc52093
font_01_sfnt_off0000f63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63F 11472 bytes
SHA-256: 32f0dbb3456456e3df133f4da2b4dc96028397adae4feedae5f78f04f3f9a99d

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