Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d070f58a949c03…

MALICIOUS

PDF

41.7 KB Created: 2020-10-10 01:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 667130bc16b840608eb97cc91d8c93f8 SHA-1: 37c05886ebfaeb851c95fff82e0aae7e40d5b0c0 SHA-256: 14d070f58a949c03fd771fd0cd421f5ccbfb33f78df04534564906d7b5710dca
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=kindle+users+manual In PDF document text
    • http://tiwoz.realfengshuimaster.com/uploads/1/3/0/7/130739602/6118057.pdfIn PDF document text
    • http://sawati.artisansdesignbuild.com/uploads/1/3/1/3/131379117/2506153.pdfIn PDF document text
    • http://jofeg.fennwaypointe.com/uploads/1/3/0/7/130776031/kuwerazafanuwudikibi.pdfIn PDF document text
    • http://files.doyogawithchelsea.com/uploads/1/3/1/3/131381806/6825727.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/1/0486/6719/7590/files/beat_the_market.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0546/0125/files/intercept_artinya_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/jonajaximibenadedeje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5116/3043/files/66998239128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6153/5132/files/71377868027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5491/5488/files/21656782787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2043/5623/files/dss_pierre_sd_phone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7057/8070/files/dumogasomoxakuman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5289/1297/files/bireponofej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4030/4023/files/zomawepetewutizonirifeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2611/9831/files/buxufewovuvivuko.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_off00006766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6766 4940 bytes
SHA-256: a92eef72d9d554902c386d58356fd0867810321191f1471ada8fdadde40b77a5
font_01_sfnt_off00007816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7816 9944 bytes
SHA-256: 05e955bf98f964d95edb39f95fb92f4776a5de021925f626860e61f7a063ed8e

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