Malicious PDF — malware analysis report

Static analysis result for SHA-256 5915e9c1a7ad44da…

MALICIOUS

PDF

74.5 KB Created: 2021-01-25 22:22:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2ce472a4e1ba87f8b1f83023630faeea SHA-1: 98917bc45f8373f3f3e1abf434233ffd0e7af921 SHA-256: 5915e9c1a7ad44dad62e5ebe31bf4c16776d5d1b94f9bc24e09977fafb7c37ec
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/aws?utm_term=free+hd+movies+2019+app PDF link annotation
    • https://mexubigewexuni.weebly.com/uploads/1/3/1/3/131384635/pirufirojapu_wuvudibes.pdfIn PDF document text
    • http://on24-system.club/missing_411_map_oregony2z9m.pdfIn PDF document text
    • https://gavizixuf.weebly.com/uploads/1/3/5/3/135334805/b8294122eb9a09.pdfIn PDF document text
    • https://luloxewawi.weebly.com/uploads/1/3/0/8/130874123/bidalo_gasinotefuv_gabesumubafo_duxevodagax.pdfIn PDF document text
    • https://dawopurasujup.weebly.com/uploads/1/3/0/7/130775219/4975814.pdfIn PDF document text
    • http://thelandofbadideas.com/xiriretirijarasugdt4z.pdfIn PDF document text
    • https://zaxifugerabapaz.weebly.com/uploads/1/3/1/0/131071175/larakowex_nazusupebuno.pdfIn PDF document text
    • https://lunafegosewexik.weebly.com/uploads/1/3/5/3/135351611/9194211.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/posufij/acls_guidelines_for_tachycardia.pdfIn PDF document text
    • http://repafow.epizy.com/87364002206.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/88300286310.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/78257816936.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/janatha_garage_telugu_movie_utorrent.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/45183329456.pdfIn PDF document text
    • http://witeguxatuzidaj.epizy.com/62234813762.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/3d_printing_manufacturing_process.pdfIn PDF document text
    • http://pijularof.epizy.com/bacteriocin_classification.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/aeroplane_game_please.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/bollywood_movies_2018_hd_latest.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD986 5268 bytes
SHA-256: f0207c3e0b9ff213ff3136eadbbdf1fd2bbd14e4e1430320ef325a28ba86e5e6
font_01_sfnt_off0000eb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6A 10484 bytes
SHA-256: d86823e86520cba86ede8e7eed25bee4abfb1682f36dbdc92bbd715e5f18f4f4
font_02_sfnt_off00010f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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