Malicious PDF — malware analysis report

Static analysis result for SHA-256 126dec1d5558c5db…

MALICIOUS

PDF

72.2 KB Created: 2021-02-17 17:37:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 903c8fd03e82093cd2ae2967747a8a27 SHA-1: 0d080f2fd1ccbce037c8a9c7a41f9c4a77968618 SHA-256: 126dec1d5558c5db364561ba7412872190d5e6b5e5e957f0e8ef66edf109e145
294 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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://crophysi.ru/wix?keyword=stock+system+chemistry+worksheet+answers In PDF document text
    • http://hydrofthol.space/there_was_there_were_exercises_primaryoov9y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408321/normal_600a5bdf3c45b.pdfIn PDF document text
    • https://wivixilor.weebly.com/uploads/1/3/4/3/134371520/8181161.pdfIn PDF document text
    • http://mihetos.xyz/kawixizisorotuxeranadutupjmsjg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_60296fb06eab9.pdfIn PDF document text
    • http://testvvd.xyz/dancing_with_the_stars_season_18moanj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390995/normal_5fff7a304c2a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_5fd7fb20b1c79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468274/normal_602baa15e5e0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451363/normal_6014eb962da17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/aviva_life_assurance_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/suninago.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/638008563.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_off0000de60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE60 5368 bytes
SHA-256: 9958a916bb6b570df7d7e8b23472787509a2940b4d9adb4afeb2cf6e6265967b
font_01_sfnt_off0000f08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08E 10332 bytes
SHA-256: 23c8f832123d10261de2a55b22f23a064173417396d66ed1755417aefb7fbccf

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