Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a9271007fed8e8…

MALICIOUS

PDF

78.8 KB Created: 2021-04-06 17:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3de3643c71766ed719e352d4384acc2 SHA-1: d8e62c6262f8c21921996c0d7f057c478660f51c SHA-256: 54a9271007fed8e8ae5b4bbc0104df0d6f26e63dfe6f51650cbedb9fc82c8228
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a search result for a programming topic, likely to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://mezovuduw.ru/aws?utm_term=what+is+loop+in+computer+programming
    • http://kungfumalibu.com/compulsory_voting_mini-_q_answer_key2nfsb.pdf
    • http://pidikugojan.22web.org/alejandro_magno.pdf
    • https://cdn.sqhk.co/naxaroja/jcjhhji/6525738348.pdf
    • https://cdn.sqhk.co/temirikuji/hihieqe/stick_fight_the_game_nintendo_switch_price.pdf
    • http://nesobaka3.xyz/98886350734hyvz0.pdf
    • http://insurancesouk.com/checkbox_checked_event_android85spx.pdf
    • http://bufo.online/oedipus_rex_analysisb847o.pdf
    • http://auto-agents.space/lenovo_yoga_920_reviewq3ufe.pdf
    • https://cdn.sqhk.co/dagosasojo/ChhaCG2/tiktok_creator_fund_payment_amount.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/limepusotanal/zugawasemuvabediku.pdf
    • https://s3.amazonaws.com/zategafozasiru/birkenhead_sixth_form_college_term_dates.pdf
    • http://tamipaw.epizy.com/sodaxonererotugi.pdf
    • http://velevemi.epizy.com/xoxufim.pdf
    • https://s3.amazonaws.com/xovajukoxin/slim_browser_free_filehippo.pdf
    • https://s3.amazonaws.com/bidurudilidujug/walimilabolaruxe.pdf
    • http://joxisuzu.rf.gd/auris_hybrid_2017_manual.pdf
    • https://s3.amazonaws.com/rabewiruzitewa/71730332557.pdf
    • https://s3.amazonaws.com/luxaduzimase/40112256349.pdf
    • https://s3.amazonaws.com/godoremitiwuja/how_to_practice_anger_management.pdf
    • https://s3.amazonaws.com/zifilobesumafi/aurora_weather_report_illinois.pdf
    • http://dovaxobuxi.rf.gd/pivizuxu.pdf
    • https://s3.amazonaws.com/sixolose/baltimore_county_zip_code_map.pdf
    • https://s3.amazonaws.com/jixerubowi/environment_canada_weather_report_victoria_bc.pdf
    • https://s3.amazonaws.com/fuwuzerijofa/bartender_10._0_software.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f71c.bin
444a1508e969a171fef197d847a395fb9fc62b484be8b90d400f2e6ba85f64d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF71C 5360 bytes
font_01_sfnt_off00010937.bin
64c52a6063e1940ed31071d62f04b126f1cd838bd87266959e601a9d80c51595
pdf-font-stream PDF embedded font (sfnt) at offset 0x10937 10628 bytes