Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f33db24737ea61…

MALICIOUS

PDF

83.6 KB Created: 2021-03-07 22:16:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 68394a21c61c273b424bc9af2294e254 SHA-1: 6be7089f23f668a39474556e1acda8ec5e32604e SHA-256: d6f33db24737ea617674ba364781c78f67b9eba86fcfd63433be518e6dc873ae
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm designed for SEO manipulation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of external URIs and the overall structure suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=agricultural+economics+graduate+programs+rankings PDF link annotation
    • http://raisinshub.pro/52126641452vxb90.pdfIn PDF document text
    • http://copyrightnotice-ig.com/shark_euro_pro_vacuum_cleaner_manual0ya0f.pdfIn PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/zipemavidimuwoxifuxe.pdfIn PDF document text
    • http://lnstagram-badge-verification.com/25226749449xt9tr.pdfIn PDF document text
    • http://osummer.space/jogo_penguin_pals_arctic_rescuei19hi.pdfIn PDF document text
    • http://strahuemsya.info/85274026120a1t5d.pdfIn PDF document text
    • https://pebujekug.weebly.com/uploads/1/3/4/3/134380671/rowugot.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/93702671621h3wn9.pdfIn PDF document text
    • http://mmmuuuue.space/gomajozunuterexesokisp2zmk.pdfIn PDF document text
    • https://josuriwomevopi.weebly.com/uploads/1/3/4/7/134769094/6483161.pdfIn PDF document text
    • https://dozasasakebo.weebly.com/uploads/1/3/1/1/131164234/9577882.pdfIn PDF document text
    • https://bigonukoduxa.weebly.com/uploads/1/3/2/7/132741189/50f3da2efb.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/xasovewipeje/98860249203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81715407-9e20-47d8-82c7-f340d119ad8e/89556166170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6448d413-1f70-4b3e-91f2-0f488242e9b9/what_is_the_julian_and_gregorian_calendars.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/rinozukifafofukokufope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7743689-dda0-4e8f-9844-18b2c4c6d876/what_is_critical_thinking_journal_articles.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/kulokezojebafosegi.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/38454296031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a5f9ae4-54a9-41c8-bdd2-86f5c6529f77/45712446611.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/best_antivirus_software_for_windows_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a61b14a-e547-493f-84fd-9d3081d42b96/what_is_the_best_keto_instant_pot_cookbook.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_off0001069f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069F 5448 bytes
SHA-256: f38b86738a173c3fea00aaa096fc762d07db33497a5e6d9fed503985f3351b8e
font_01_sfnt_off00011915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11915 13472 bytes
SHA-256: ccc468f405eb77b30a5c47f2cb6104cb772f00a6e94cd2395d4ae220e216acf2

Open this report in the interactive analyzer, or submit your own file for analysis.