Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa8789ab96a7254…

MALICIOUS

PDF

75.8 KB Created: 2021-02-16 03:19:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 7a34d48f181b4f23aedfdeb9b767e83c SHA-1: 8f412a815c22b3df8fb20b836859446d22547cb2 SHA-256: afa8789ab96a7254c1ce5f66cd23511b0fd0688eb867a60afa9a5dbb94e62bfb
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or redirection infrastructure. The document body, though heavily obfuscated, contains a lure related to 'latest covid news california', likely intended to trick users into clicking the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jottigo.ru/aws?utm_term=latest+covid+news+california PDF link annotation
    • http://blockingscenery.com/dr_gene_scott_teachingnme11.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/herhKMK/sadixadusuxaxoke.pdfIn PDF document text
    • http://morj.space/vevor_30l_distiller_manualz8gx6.pdfIn PDF document text
    • http://copyrighthelpptteam.com/matrix_organizational_structure_pros_and_cons4p3w5.pdfIn PDF document text
    • https://cdn.sqhk.co/motanunika/iaLfgho/juice_wrld_splash_2019_spotify_streams.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/ghIP5ih/fast_rider_moto_bike_racing_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/dhcvihE/aaa_auto_insurance_near_me.pdfIn PDF document text
    • https://taxinureku.weebly.com/uploads/1/3/0/8/130814469/zisepirukubi-jopoxepozusa-timozusuluj.pdfIn PDF document text
    • http://cooldomen.space/voviwifizobolitov2s96v.pdfIn PDF document text
    • http://italywow.space/49272786460h9mfi.pdfIn PDF document text
    • https://cdn.sqhk.co/lotivadafe/Sgfig3h/account_balance_sheet.pdfIn PDF document text
    • http://radanews.site/85316559316bf7tx.pdfIn PDF document text
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/561867.pdfIn PDF document text
    • https://cdn.sqhk.co/zitajazasu/JYhbgfm/show_me_lanes_bowling_st._louis_mo.pdfIn PDF document text
    • http://interior.estate/besasozagaxiwusorisidomeg85otc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bulozor/torch_browser_for_windows_8._1_free.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/nedalakumefazip.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/togujajelafifi.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/implant_abutment_connection.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_off0000e188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE188 5108 bytes
SHA-256: 2a8339b401a8cbdf7e111fe771cbfe93e0151d8e1945c1e163e74001a47cd771
font_01_sfnt_off0000f30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000fb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB99 10680 bytes
SHA-256: 9ecb312b4610714c8011260b445a536c475ef3b7dec4823fe2fd8449d2669e0f

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