Malicious PDF — malware analysis report

Static analysis result for SHA-256 4356cb2223d54e43…

MALICIOUS

PDF

66.5 KB Created: 2021-01-08 14:00:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b0a4e8893d2b1af99eff9702fe6e0a84 SHA-1: 6b0498e565a78a584d5a32fd6f9c86e3dbf09023 SHA-256: 4356cb2223d54e4325afd2d9990e1047d6b99e9506295467d507d16b149cc145
254 Risk Score

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
  • 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.
  • 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.
  • 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://traffmen.ru/123?utm_term=prince+of+peace+baptist+church+baltimore+md In PDF document text
    • https://vifelewumatorav.weebly.com/uploads/1/3/4/6/134669873/jebetogaziveledobed.pdfIn PDF document text
    • https://nolujamikudaze.weebly.com/uploads/1/3/4/8/134868466/wabumukubon.pdfIn PDF document text
    • https://zekubetude.weebly.com/uploads/1/3/0/7/130738740/2adbeff7.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/wedidik.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/ibhgXBS/skater_xl_maps_list.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/2a9e50b4b.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/QhidgfO/80793510257.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/f93919e0-3235-432e-8d1f-65d35b13b04a/81668632151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d49d320-ce6a-4ae2-9de4-7f5107921629/walafakokireva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afce7d47-3c96-46c8-a735-f724a91d1358/cable_one_prescott_az_channel_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72bfcadf-e1aa-4e29-830e-143e711c2180/50738500928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3a426fd-9d8c-4bc2-ab64-6407e1d011df/electricity_and_magnetism_study_guide_physical_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb21f283-cf08-47a5-ac6f-98112e66d3b3/bible_in_90_days_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce8d954-4116-4f4c-9e5a-b77e7b1dfa1c/mary_b_stratton_park.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5d61075-62ff-41eb-ada2-84345af7ddd3/xukijimamipugabif.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_off0000c53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC53F 5536 bytes
SHA-256: 335999645685b64197032e76fced0524e6c50927196262af82e88d25ae9079da
font_01_sfnt_off0000d7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E2 10896 bytes
SHA-256: 1a3032b2087234df104fb4bbbc2984faa49c943bbd55c666f2f905c4b31085c4

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