Malicious PDF — malware analysis report

Static analysis result for SHA-256 40af03453c905302…

MALICIOUS

PDF

84.9 KB Created: 2021-01-16 12:31:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8ed861f92b389c6ddb9adbb5063835c8 SHA-1: e425c3fa1cb616d355342d344de259ad37b4137e SHA-256: 40af03453c90530289b3361b6f9603fcbaaf89c096aea2f7e563adb10a11f934
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it links to known malicious redirector infrastructure, specifically 'https://traffking.ru/aws?utm_term=travel+portal+template'. ClamAV also detected it as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The document body, though heavily obfuscated, suggests a lure related to a 'Travel portal template', likely a phishing pretext.

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
  • 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://traffking.ru/aws?utm_term=travel+portal+template In PDF document text
    • https://site-1248123.mozfiles.com/files/1248123/48072583806.pdfIn PDF document text
    • https://site-1175276.mozfiles.com/files/1175276/50651763768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421330/normal_5fe79677b9636.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/hhjmFTq/cpa_yellow_book_cpe_requirements.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5fb943fcc7d96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411229/normal_5fb37208c1c51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393628/normal_5fada1f74d810.pdfIn PDF document text
    • https://site-1177111.mozfiles.com/files/1177111/wapking_in_2018_video_song.pdfIn PDF document text
    • https://site-1175416.mozfiles.com/files/1175416/bus_game_apk_2017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5fa2c59999510.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/jcxiijb/ludo_star_free_download_for_iphone.pdfIn PDF document text
    • https://site-1172602.mozfiles.com/files/1172602/history_of_christmas_traditions_around_the_world.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454436/normal_5fd817a07ef8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000114dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DC 4796 bytes
SHA-256: 9b6f120c3332f412aae16ba60676c8232f3405d28174d16dde67af557d1cc652
font_01_sfnt_off0001251b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251B 9860 bytes
SHA-256: 2f7f7b9cf5a215227d0c46b2de5ee8e15ac273cbf69476569fc99e84b63c4216