Malicious PDF — malware analysis report

Static analysis result for SHA-256 716c49e4357a2cbe…

MALICIOUS

PDF

88.4 KB Created: 2020-12-25 02:53:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0e57b0c49eaa6e614034c0823bddfa10 SHA-1: e2ee360b09109cea363aabf10d51cfb1e34a6754 SHA-256: 716c49e4357a2cbebd0307dbd5106241b1c35a907af03c35eb78e269f7e297f3
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, identified by multiple heuristics as a redirector for phishing or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of malicious URLs points to a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=ride+on+ride+on+in+majesty+st+drostane In PDF document text
    • https://cdn.sqhk.co/kitaparek/ZgcTheW/geometry_dash_lite_secrets.pdfIn PDF document text
    • https://cdn.sqhk.co/tesinogopano/gjChaid/swat_movie_cast_name.pdfIn PDF document text
    • https://cdn.sqhk.co/gigemuji/bjc2igW/warning_flags_miami_beach.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424630/normal_5fca04fcddf55.pdfIn PDF document text
    • https://cdn.sqhk.co/megodiwe/h8jfhb3/gikug.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/TgjEjeJ/wings_near_me_columbus_ga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378618/normal_5f964bf278c91.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/800b92e6-cbd0-4503-977c-73e409a83c13/marvel_guardians_of_the_galaxy_123_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82a3bcf4-15b6-4c89-aa58-eff991c3a39d/amy-leigh_hickman_parents.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69fccf93-571d-4381-92a5-655e52947420/33847174872.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/appium_android_back_button.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b51c08-7667-490d-b9a9-e11b7eaa3d9b/brooks_gts_15_mens.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c802c7c5-08b6-4877-b5fb-c984b2d2955d/77777184805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd872ac-41f0-46ba-9a6f-a24576ffbb48/the_clique_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba4f662-6839-4466-a42a-7318429f8a02/44666945369.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_off00011b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1C 5124 bytes
SHA-256: 33d07e95d3eb647045862687d27dc9671efc4991ee58f7e497ae4c7920db8bb7
font_01_sfnt_off00012c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C7F 11948 bytes
SHA-256: abba2a39efbbaa05a08855ee710c515ed258093c2a3e24046eec6b36a1c116c6

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