Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc692a98ce8185b…

MALICIOUS

PDF

137.6 KB Created: 2021-03-21 10:01:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3bb775ac621a71a58eac0e4639c728a SHA-1: bdf3fab9b85ff10992770bcead2132f775fe104e SHA-256: abc692a98ce8185b3782364997cc054502d8c631583ea323a0815c927afe8ad2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, directing to various URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest the document's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://jumiwimov.ru/123?utm_term=calefont+junkers+tiro+forzado+manual
    • https://cdn.sqhk.co/duwokarewesu/jhagevP/nubew.pdf
    • http://xitodefigatefuj.medianewsonline.com/34777585026.pdf
    • http://sozaxesugoj.mywebcommunity.org/kenmore_he_washer_not_draining.pdf
    • http://jemulobapamiwu.mywebcommunity.org/ekg_book_dale_dubin.pdf
    • http://finofubamu.mygamesonline.org/atividades_de_alfabetizao_3_ano_em.pdf
    • https://cdn.sqhk.co/pininipata/dEjfjbY/2567166629.pdf
    • http://xopoxek.iblogger.org/what_does_justice_look_like_summary.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bibarixe.epizy.com/jawedifuloguvuri.pdf
    • http://vilatelisoto.onlinewebshop.net/anunnaki_tablets_of_destiny.pdf
    • https://s3.amazonaws.com/safenalavojuwu/beyond_compare_plugin.pdf
    • https://s3.amazonaws.com/fadupazageraf/31610767568.pdf
    • https://s3.amazonaws.com/fojaxexino/cuisinart_coffee_maker_with_grinder_not_working.pdf
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_27ec628e8d274814a82c163a8bc0e85d.pdf?index=true
    • http://pazizota.rf.gd/icbc_report_claim_vancouver.pdf
    • https://s3.amazonaws.com/sevoga/13752601829.pdf
    • http://fukibas.epizy.com/m._sc_exam_date_sheet_2018.pdf
    • https://s3.amazonaws.com/zafirawit/use_android_tablet_as_second_monitor_bluetooth.pdf
    • https://s3.amazonaws.com/wakuzidi/the_aftermath_game_no.pdf
    • https://3f735f5a-cd1c-4288-bd93-adeff6e084d9.filesusr.com/ugd/bcc0e4_5fe4bca86dc247ea9a5ff87061454b71.pdf?index=true
    • http://xesesusotuniw.rf.gd/ludezadovetetuxiwizaf.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_off0001dc22.bin
6715a067e272772f1c65ffb24c5b799f10ec7a81c3d53d5e815c15d6484c8053		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC22 5148 bytes
font_01_sfnt_off0001ed9f.bin
743df35ef53ad0ad23b5a89a6113b53964de150180585ebd0a245ed27760d2c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED9F 13464 bytes

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