Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7a5d5a9a4f590e5…

MALICIOUS

PDF

70.5 KB Created: 2021-01-10 17:56:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d1994c5a1bd7e9d9e9b998427147c806 SHA-1: 0834c36ba31c8efb36bca573b4057e32a16b9d0a SHA-256: d7a5d5a9a4f590e59ff35f398842bf93fb60ce864d60d55afaca99d4eea9b159
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on link farm domains, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external PDF links, and the ClamAV detection as 'Pdf.Phishing.Trojan' further supports malicious intent. While no scripts were directly extracted, the structure and external link farm are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffe.ru/aws?utm_term=betrayal+piano+sheet+music PDF link annotation
    • https://xojujafu.weebly.com/uploads/1/3/4/6/134633902/fifojakefewunak.pdfIn PDF document text
    • https://cdn.sqhk.co/xesozugis/chbhjVB/is_there_a_vikings_season_6_part_2.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxoporerom/9htsehe/regrann_repost_for_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/kinifukix/Bjdthef/the_crossing_2004_full_movie_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/dqigyBi/minecraft_pocket_servers_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/h4VhiaX/at_t_global_network_client_error_412.pdfIn PDF document text
    • https://cdn.sqhk.co/tizudukokeni/Pgj86Fm/kamirek.pdfIn PDF document text
    • https://vafomelopujoxo.weebly.com/uploads/1/3/4/8/134864043/fbb5eb7.pdfIn PDF document text
    • https://cdn.sqhk.co/komajekolino/whfZgct/mogekajikuzab.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebevon/gnahaig/ara_pacis_storia_dell_arte.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/mipeboro/dudewemobomofibin.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/32007853662.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/black_swan_taleb.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/lesson_outline_describing_weather_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/56299527514.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60D 5324 bytes
SHA-256: c3f7335b446d7019e3352c13a7b2fe0d39082fe221d5c1f31a65b0c46d59210a
font_01_sfnt_off0000e804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE804 11200 bytes
SHA-256: 08e7b2292ec743ceb22059c3cf40107e09f3357b2b8b78549bc37611c49f184c

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