Malicious PDF — malware analysis report

Static analysis result for SHA-256 081b61caf343772a…

MALICIOUS

PDF

73.2 KB Created: 2021-06-11 02:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 84bd0c00f55b6afe4fa28d097810f0d1 SHA-1: ce69fb53add4de009218808dd89f9f7522fbbce3 SHA-256: 081b61caf343772a91b662946fc29c5cc540c74faa9f232556b50d4997332289
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicative of a link farm. The presence of a lure for downloading a game ('pokemon red rescue team download') suggests a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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 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.
  • 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://chcial.ru/pbw?utm_term=pokemon+red+rescue+team+download PDF link annotation
    • https://fejevudud.weebly.com/uploads/1/3/2/6/132695511/7152113.pdfIn PDF document text
    • https://zabonipe.weebly.com/uploads/1/3/4/4/134487368/9800394.pdfIn PDF document text
    • https://narobukedezupe.weebly.com/uploads/1/3/0/7/130738621/93c50a78c7e4a8.pdfIn PDF document text
    • https://xekejinobo.weebly.com/uploads/1/3/0/7/130776350/1553777.pdfIn PDF document text
    • https://jifabipesetumef.weebly.com/uploads/1/3/4/8/134896168/4111559.pdfIn PDF document text
    • https://xivexibajewubud.weebly.com/uploads/1/3/1/0/131069970/dilaw-gizedapos.pdfIn PDF document text
    • https://zitadinenere.weebly.com/uploads/1/3/1/8/131871439/tibafoligeto-zaxubes-gakedovob-vitajuda.pdfIn PDF document text
    • https://xonaxeritugu.weebly.com/uploads/1/3/0/7/130739926/biwalokejaridediware.pdfIn PDF document text
    • https://ganakinupep.weebly.com/uploads/1/3/4/5/134599301/2e11cd.pdfIn PDF document text
    • https://saxiwevirakete.weebly.com/uploads/1/3/4/7/134715854/rutubutufotokomiwu.pdfIn PDF document text
    • https://katibaluzopoxu.weebly.com/uploads/1/3/0/7/130738884/1145705.pdfIn PDF document text
    • https://toxovapuwelubu.weebly.com/uploads/1/3/4/7/134733969/tikix-takabaja-ladiwusodov-matitirap.pdfIn PDF document text
    • https://xikoxuzit.weebly.com/uploads/1/3/4/6/134632277/ruzapusakubu_godekifodisuw_mujoz_mejemex.pdfIn PDF document text
    • https://wuwobetag.weebly.com/uploads/1/3/4/7/134705291/xiwilawixurumosiwo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sinorodolu.pbworks.com/f/feelings_and_emotions_worksheets.pdfIn PDF document text
    • http://jotoxipigi.pbworks.com/f/pexoximamigeloxusezap.pdfIn PDF document text
    • http://gazumadu.pbworks.com/f/54140865268.pdfIn PDF document text
    • http://fukibaso.pbworks.com/f/jenonotedanogubod.pdfIn PDF document text
    • http://piwazufoli.pbworks.com/w/file/fetch/144750951/sokuzasomavi.pdfIn PDF document text
    • http://puzavofan.pbworks.com/f/how_to_set_time_on_sharp_weather_station.pdfIn PDF document text
    • http://vakerul.pbworks.com/f/free_excel_assessment_test_with_answers.pdfIn PDF document text
    • http://lewiwebula.pbworks.com/w/file/fetch/144948246/dakatuwo.pdfIn PDF document text
    • http://gutupum.pbworks.com/w/file/fetch/144665547/agneepath_full_movie_1990_watch_online_dailymotion.pdfIn PDF document text
    • http://panuduxeruv.pbworks.com/f/62467786601.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_off0000e0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E5 5240 bytes
SHA-256: b66a499185b32c60cd9f9ae99afd3efe055e0e870cbd14e8606e9de1874b53f1
font_01_sfnt_off0000f2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B7 10764 bytes
SHA-256: bbb076749bf2eb8cefc8ff77e585013ed522108fd19a35980cc322b1182bfc40