Malicious PDF — malware analysis report

Static analysis result for SHA-256 868e4970c82f2da6…

MALICIOUS

PDF

91.9 KB Created: 2021-05-25 18:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f320cd284af1a1a891b72ab3ad39da6c SHA-1: 6eb1979b32252279abc99230d33f81e2869d426c SHA-256: 868e4970c82f2da68126e98b35550369078edabba84490fc39363ec81321a552
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a mass of external links, including a redirector URL, which is indicative of a phishing or SEO scam. The document body, though heavily obfuscated, contains text related to 'Sap design studio end of life' and the authoring application 'wkhtmltopdf', suggesting a lure to a malicious site.

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://nipisod.ru/strik?utm_term=sap+design+studio+end+of+life PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392862/normal_601b7aa58665b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484156/normal_602c231b7906e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403259/normal_5fda59540dfd4.pdfIn PDF document text
    • https://guvefivilemu.weebly.com/uploads/1/3/4/3/134397682/ff63c3ff33dc3.pdfIn PDF document text
    • https://piwitaxoz.weebly.com/uploads/1/3/4/6/134603619/lesowunurakubod.pdfIn PDF document text
    • https://peworiwuka.weebly.com/uploads/1/3/4/6/134693567/99f0b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2e885b6-6e92-4165-ab7b-83c98d741b05/codex_gigas_english_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/66050177956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b058d9d-8e82-48d3-a6ed-89246e8e4c1a/vorebubarebegafegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b21f16a0-205b-4f1c-bd42-ce69363c37e1/rigoxidatisugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16be5696-5aa4-4cbc-95cc-3502486b4a18/vaforilesad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee6409e3-ec7a-48b5-9317-063130e6611c/5169667967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15bf5239-a83d-4df2-9ce4-94043a52e475/jupunejemiwidaseda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3bbcab7-ede5-447f-81a8-18d4cba8327a/can_i_become_an_emt_in_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/netflix_movies_to_computer_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/captain_jack_sparrow_tamil_movie_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/29268363217.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/wedigadebagelib.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_off0001294e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294E 5216 bytes
SHA-256: 275db8c09ac62906f44c24dbd6cb210d1c6ebe3e681ebe3714befd269e19b112
font_01_sfnt_off00013b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B26 11580 bytes
SHA-256: 1d5af39262d8692741553f5497120017d04709c7a99192910067d619b270f69f

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