Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e5d2a47d4faf2f2…

MALICIOUS

PDF

42.4 KB Created: 2020-08-24 04:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1a69dd1c44872e13068737a6f8cff0c1 SHA-1: fcba53447e692e579caf01b2d1a020d0add09884 SHA-256: 6e5d2a47d4faf2f2073e92175f39697dfb5a116dd9921117b88d8b83dba7cd8b
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://ttraff.com/pify?keyword=scofield+bible+commentary+pdf In PDF document text
    • http://files.theglasgowgroup.org/uploads/1/3/1/4/131483318/laduf.pdfIn PDF document text
    • http://vifewij.uowl.org/uploads/1/3/1/4/131407440/14f73e.pdfIn PDF document text
    • http://gutaxikad.shonareppe.co.uk/uploads/1/3/0/8/130814328/1859802.pdfIn PDF document text
    • http://natule.kelseysmarina.com/uploads/1/3/0/7/130738850/demujojakofevejegu.pdfIn PDF document text
    • http://files.davewallheating.com/uploads/1/3/0/7/130738993/1446378.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/1/0431/2200/0029/files/88750155053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/lokejilagolepapomozunedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/upper_back_pain_exercise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2126/0184/files/burger_business_plan_sample_in_the_philippines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7202/8823/files/40410937386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/0707/8564/files/menadifotidobujubelutawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/9500/4070/files/aleister_crowley_tarot_deck.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/83138911974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1219/4463/files/xutazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/vufakiwonegadanexifuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/gamedewita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/60583692170.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_off000067dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67DD 5468 bytes
SHA-256: 6d574ad921698c396f9c2c0957419beb5744ecaf68a13322eb9a943a09a0a398
font_01_sfnt_off00007a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A59 10120 bytes
SHA-256: dbad2ba0dfe87a6aa91daf61f9fba37048a71260f3496d6686a83e5406f38e31

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