Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c42001c15a618b0…

MALICIOUS

PDF

48.0 KB Created: 2020-10-04 02:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0baf7ef441a9e82de70e7a8fa5151be2 SHA-1: 61a0fb8cba4a82e7e64745be0426c842844aba9c SHA-256: 1c42001c15a618b0e71233d47463d0a2a2313151393ba54ee8f3cc2704a09f05
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://cctraff.ru/strik?keyword=dbz+tenkaichi+3+mods In PDF document text
    • http://xafixaza.myduckdiary.com/uploads/1/3/1/4/131452838/zifowem_fepiwuxelabo_neguzofona_duxebaxino.pdfIn PDF document text
    • http://boban.sunilgupta.net/uploads/1/3/0/8/130813827/bavulexipax-toranetaliju.pdfIn PDF document text
    • https://site-1040249.mozfiles.com/files/1040249/66000092520.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/xovugawanupifoxiwuwo.pdfIn PDF document text
    • https://site-1040140.mozfiles.com/files/1040140/jopadawife.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/1/0433/4862/3510/files/47715775975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9924/6759/files/seven_headed_dragon_jamaica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2171/2034/files/nickys_folders_10_pocket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/9062/6710/files/mass_effect_3_multiplayer_most_op_class.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7499/7403/files/dedepelevegad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b9e0648-abe4-4fbd-9b98-fe8894789c78/74964119658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43aa3b24-efb0-4845-9c38-b519714a893e/fudagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8370816-961f-4ae0-a609-82d02f16ec2c/tuzuwolakogidipamed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c624396-0068-4a65-8623-af40c214c01c/resas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ca9c3bd-f49f-4d8c-a867-01c4207537d6/15071577867.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B5 5468 bytes
SHA-256: 39ea43e099a1d9b4bd50375660d79fbf7fdcf5c48e4e9df206f3ce61e54c9567
font_01_sfnt_off00007936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7936 10324 bytes
SHA-256: 32b7d281bf458b2f85610344bd283ce19aaecf1e14d8aefcb4f2078f6642265d
font_02_sfnt_off00009ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CCC 16332 bytes
SHA-256: 2a247a753e8a01f70d7fcfa74e2d7baad7259a755652018209d99d19020bd12c

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