Malicious PDF — malware analysis report

Static analysis result for SHA-256 132c356d48444f55…

MALICIOUS

PDF

71.0 KB Created: 2021-01-29 19:14:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9c2e4ebc79a14506a6b27dd448c2d913 SHA-1: fcc9130ce9ec70f1d0ab85cbd25d9b37b1b7af1d SHA-256: 132c356d48444f55acd815d7a372640a903bd50d4671c6c680178f402cd30819
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file, likely acting as a downloader or redirector for further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://leonvi.ru/aws?utm_term=fda+myanmar+guidelines PDF link annotation
    • http://fuluwube.22web.org/adrenal_carcinoma_guideline.pdfIn PDF document text
    • https://lakadepoti.weebly.com/uploads/1/3/5/3/135301691/tolosi_boxusufivejip_zigut_wejozuzeriti.pdfIn PDF document text
    • https://lafazomutege.weebly.com/uploads/1/3/0/7/130740298/bezamodamibu-dudagikuturegiw-rakabem.pdfIn PDF document text
    • https://cdn.sqhk.co/kulizuxekume/jAhj9QP/nuwikawepowufepamo.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/burivisilivunezun.pdfIn PDF document text
    • https://labatozun.weebly.com/uploads/1/3/1/6/131607827/zowaj.pdfIn PDF document text
    • https://voperupazekeko.weebly.com/uploads/1/3/4/5/134505312/dbf1937706b.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/ghaRjdx/spider_stickman_rope_hero_gangstar_crime_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/phfyKji/26749407966.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/I4gfOjh/alan_walker_tiles_hop_music_games_songs_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nujudemugipi/hhiidMm/90s_music_videos_r_b.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/poresi/vulabazij.pdfIn PDF document text
    • http://lojokedasu.rf.gd/78872887473.pdfIn PDF document text
    • http://pumumiz.epizy.com/lose_yourself_guitar_tab.pdfIn PDF document text
    • http://jufosuliz.epizy.com/riwusi.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/zidadekoxela.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_off0000d94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94B 5204 bytes
SHA-256: 198a194fe1aac47792f0d6d1eb80464a1c62c4fbd371a4be2e1332a67948eb52
font_01_sfnt_off0000eaf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF2 10496 bytes
SHA-256: 1214037be97db4374ba88e288d4fcd59d436b41110c97b599e6f9c3252660f40

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