Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf54d4219e2bae2…

MALICIOUS

PDF

78.0 KB Created: 2021-04-19 06:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fc843b7dcbc21cb4df64d4d9adb61838 SHA-1: 88d33b7f40eef62a1970a2096c7840860582dcbc SHA-256: 3bf54d4219e2bae26d19799bc8d612b4804a4d27e2f8ed31ecfe36d8885c5bc0
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jottigo.ru/strik?utm_term=army+information+paper+format+regulation PDF link annotation
    • http://aires.fun/jaxisopupulofidexejivazuzvaqq0.pdfIn PDF document text
    • http://badge-verification-center.com/pidubirvcto.pdfIn PDF document text
    • http://fresh-ita.fun/troy_bilt_2410_startingpkk7l.pdfIn PDF document text
    • http://wexoxunesixu.iblogger.org/nature_of_biology_book_1.pdfIn PDF document text
    • https://fegenogo.weebly.com/uploads/1/3/5/9/135981842/4666055.pdfIn PDF document text
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/gifadepasukez_sexegosuwes_wesofetobupog.pdfIn PDF document text
    • https://dezuvatag.weebly.com/uploads/1/3/4/6/134667454/7fea6c.pdfIn PDF document text
    • http://didavixakodix.22web.org/bose_soundlink_bluetooth_manual.pdfIn PDF document text
    • http://babysampler.com/why_does_my_sony_dvd_player_have_no_soundhhroz.pdfIn PDF document text
    • http://legivupipofu.66ghz.com/samthing_soweto_akanamali_live_performance.pdfIn PDF document text
    • http://yourbigdick.space/47762835852d5sg5.pdfIn PDF document text
    • http://com-connexion.xyz/jezalolakelavoxiramer0mnq.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/pressure_transducer_calibration_procedurec0k9f.pdfIn PDF document text
    • http://vovpomnim.ru/b_pharmacy_syllabus_2nd_year_201818p9k.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/tesojotojuzepojuhijv5.pdfIn PDF document text
    • http://how2clever.com/sakura_blade_for_sale39etp.pdfIn PDF document text
    • http://reestr.site/what_is_the_circumference_of_a_large_egg9cqai.pdfIn PDF document text
    • http://onlyforyou.space/how_to_find_the_measure_of_one_exterior_angle_of_a_polygonmue0k.pdfIn PDF document text
    • http://prizinsta24.site/canon_powershot_sx510_hs_accessoriesehh1s.pdfIn PDF document text
    • http://rakukoke.22web.org/what_does_flock_mean_in_urdu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://talegotowaf.epizy.com/zimasolifeguzijib.pdfIn PDF document text
    • http://pajiridi.rf.gd/guxajep.pdfIn PDF document text
    • http://rilasiwawizumo.rf.gd/20425576930.pdfIn PDF document text
    • http://ponekoj.epizy.com/97150144346.pdfIn PDF document text
    • http://xojifelogumexe.rf.gd/hanuman_chalisa_telugu_free.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_off0000f3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3ED 5136 bytes
SHA-256: 2ca3c2ec67425281c30a88f3803ca1e23d863dfd840a4753759c208a67b08cf8
font_01_sfnt_off00010561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10561 10852 bytes
SHA-256: 17ceafcc277afb203c43fb7e401d099809b349bf4b4bfac5e6c91ba1fb9c4ce8

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