Malicious PDF — malware analysis report

Static analysis result for SHA-256 7413341b675818df…

MALICIOUS

PDF

68.0 KB Created: 2021-03-27 22:08:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 678895b84b72eee91623db7dc1191b67 SHA-1: 279a5ac18a72b2a58e2e0c5c7dee955a0d65a2da SHA-256: 7413341b675818dfb6f27833998c9c59ed627628d6f94e8763dcc9b47915bfc5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using link farms on disposable hosting, suggesting a campaign to distribute malware or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wix?keyword=festool+router+guide+rail+adapter PDF link annotation
    • http://forsage.pw/java_basics_freeq0lyf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385633/normal_5ff8b6ab65396.pdfIn PDF document text
    • http://upsbox.ru/plato_five_dialogues_sparknotes_euthyphrovqbrh.pdfIn PDF document text
    • http://kizadunejin.22web.org/advanced_aircraft_systems_david_lombardo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426415/normal_603aca658b3e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501231/normal_60027bef35d4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483104/normal_6024a0d19c144.pdfIn PDF document text
    • http://fanogizakelime.iblogger.org/9609284221.pdfIn PDF document text
    • http://groshyk.site/49740989104mnqht.pdfIn PDF document text
    • http://uose.xyz/vawafewupugir8its.pdfIn PDF document text
    • http://zenafek.iblogger.org/45955605068.pdfIn PDF document text
    • http://wowitaly.space/3404909362hq7ys.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413719/normal_601d612f092d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482880/normal_604d788acb29b.pdfIn PDF document text
    • http://vakekaninu.iblogger.org/19482762988.pdfIn PDF document text
    • http://wirodapupoz.iblogger.org/17679443114.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mobopufo.rf.gd/housefull_movie_loser_song.pdfIn PDF document text
    • http://farixotipiw.rf.gd/zazub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7668ce5a-a665-4af8-8a69-6d857b0fedf3/how_to_apply_adhesive_vinyl_to_furniture.pdfIn PDF document text
    • http://tesodefodavi.rf.gd/biology_book_9th_class.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a8557f8-6af5-4032-908c-0d525fdf5b80/3175646723.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_off0000cd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6E 5080 bytes
SHA-256: 951606d728eef4680792f91bf072e2127049293e27f8329e1c07b0f4551eb8cf
font_01_sfnt_off0000dec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC5 10476 bytes
SHA-256: d3594f64e9b85b54a4b6708cd54dacc3e55e859f5e6a0b8b008006c5cf58aeec

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