Malicious PDF — malware analysis report

Static analysis result for SHA-256 336fe60c192b73f3…

MALICIOUS

PDF

44.1 KB Created: 2020-09-29 19:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2fec58155923dac2f4b54c655c3759b9 SHA-1: 72cdb20ffa7bfb113cb9393f3eb49eb8e57fe7b8 SHA-256: 336fe60c192b73f3531fbe628aa01f333975a7a5b9e308e8725fd46b89a6b1a5
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ggtraff.ru/strik?keyword=inductive+and+deductive+reasoning+in+math+pdf In PDF document text
    • http://files.thepulsefromcandi.com/uploads/1/3/2/6/132682124/12364d2b861a2cf.pdfIn PDF document text
    • http://takededo.mrsreidart.com/uploads/1/3/1/0/131070340/jenazufek_lugezomitivuvof_kagigireka_fulatagigem.pdfIn PDF document text
    • http://nugut.omcloveinc.org/uploads/1/3/1/4/131406149/giraxaxogijukog.pdfIn PDF document text
    • http://povobo.iaclals.com/uploads/1/3/1/0/131069921/b0ae3ae8bcc9da.pdfIn PDF document text
    • http://pevazibin.lcandlepress.com/uploads/1/3/0/7/130776082/deserivum-vajikijirixa.pdfIn PDF document text
    • http://files.rwna.net/uploads/1/3/1/8/131871786/pesegan.pdfIn PDF document text
    • http://files.bigpinelumber.com/uploads/1/3/1/3/131384638/8606953.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4925/4817/files/gift_certificates_template_for_golf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9342/0951/files/65168856053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7392/9369/files/allianz_claim_form_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0838/5439/files/22499647883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/58509438231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa10cae5-32dc-47f1-9574-e6e1a36a8286/92969143953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b2a8a3c-ceee-4650-ba95-b6601a961741/2674919618.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_off00006db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB5 5532 bytes
SHA-256: d347ab4ea1f0495bbcb36accdd4174a7ceb29cdffa49bca6f9bc5164d93a2467
font_01_sfnt_off0000806c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806C 10332 bytes
SHA-256: 6b61e38daed2e58443b724816c4a306a8348e8610327fbeecfef37315d8c2c0e

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