Malicious PDF — malware analysis report

Static analysis result for SHA-256 f685734c7d679d14…

MALICIOUS

PDF

74.4 KB Created: 2021-02-05 08:43:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0e30e5083329350152a52acae969d71b SHA-1: dfdb71b5a69238d793ca17d24e7c54e1c36ebec1 SHA-256: f685734c7d679d14b73cd1367b34a02b888901d5b85170f97085f0f65d4b9ac7
134 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan distribution attempt. It contains numerous external links, many pointing to disposable domains, and a heuristic indicates a deceptive download button lure. The presence of external URIs and the overall structure suggest the document is designed to trick users into downloading a secondary payload.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=download+extraction+full+movie PDF link annotation
    • http://mgacessoria.online/18324148142vztvb.pdfIn PDF document text
    • http://mediaverifiedbadge.com/fimelafaji83elw.pdfIn PDF document text
    • https://zikegebuner.weebly.com/uploads/1/3/4/8/134856814/dobedasipixo.pdfIn PDF document text
    • http://energierecrute-emplois.com/42765384593fxb7b.pdfIn PDF document text
    • http://vulgargirls.fun/discount_code_for_walmart_pickupdwy92.pdfIn PDF document text
    • http://skout.tech/49204324444vh5ax.pdfIn PDF document text
    • http://4escam-bot.online/71983311494r98pn.pdfIn PDF document text
    • https://xizikako.weebly.com/uploads/1/3/0/9/130969027/pobokefijof.pdfIn PDF document text
    • http://podjem2.club/sentence_fragment_worksheet_with_answers0h6tt.pdfIn PDF document text
    • http://betmoy56.com/gat_subject_management_sciences_mcqs_with_answerstx1gd.pdfIn PDF document text
    • https://lopuxewununoj.weebly.com/uploads/1/3/4/7/134748711/tijavixe.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/dotivaf/dota_2_underlord_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/91070852684.pdfIn PDF document text
    • http://tawatibajat.rf.gd/baldur_s_gate_2_apk_2._5.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/voicemail_indicator_android.pdfIn PDF document text
    • http://deroselewem.epizy.com/6380218202.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_off0000e79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79F 5208 bytes
SHA-256: 4277fd9976f4f84af60352803d248c7f429b8d4c2af749d6b32fee9d39bff188
font_01_sfnt_off0000f969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF969 10184 bytes
SHA-256: 4f17741e2fde18ac419bf2a8ed118147d08318297f13be305683c23d5475953b

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