Malicious PDF — malware analysis report

Static analysis result for SHA-256 58d7977215f0ff0e…

MALICIOUS

PDF

38.7 KB Created: 2020-10-04 21:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8bace42d99384400406b40716fd47c95 SHA-1: f700db3b27d29bad9155509da19abefefccec7b1 SHA-256: 58d7977215f0ff0ef3d8ad3deae1a12d13c2d2e442bd4c0cc5e7fd1a3438a4b3
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=animal+crossing+new+leaf+rom+apk In PDF document text
    • http://files.rsworks.org/uploads/1/3/0/7/130740323/tuvukutidud-vejof-sikegalaniv-tuxaku.pdfIn PDF document text
    • http://files.jacobtrimble.com/uploads/1/3/2/8/132814343/4c19076399.pdfIn PDF document text
    • http://files.kmitchell.ca/uploads/1/3/1/3/131378975/lakudirosebanenusa.pdfIn PDF document text
    • http://files.autodogfeeders.com/uploads/1/3/0/7/130738894/jitovurimafina-kifife-mokopegavovefuk.pdfIn PDF document text
    • http://vixokun.maramare.com/uploads/1/3/1/3/131380582/0802f0ef0eebd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9100/5091/files/sonny_perry_dance_nashville.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9614/5062/files/wumasazemebedezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5533/5582/files/sonimimenulenofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9646/5823/files/bitomudipux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9363/3440/files/harbor_breeze_ceiling_fan_remote_control_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6974369f-99f1-497a-aa1f-6c36748ec796/90978137738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cef407a1-26e0-44cc-8e4b-05e87e547409/kekil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdea6faa-a4ea-4a97-b2a6-def3545abaef/38886469512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cb29a50-3f22-49e3-843d-7987013aac19/10636044889.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BDB 5188 bytes
SHA-256: 8eef9a873008878bba8ad9ea55c9198c96bff4c64a0839748474883a2816ed00
font_01_sfnt_off00005d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D66 10060 bytes
SHA-256: 00c0b6ead438a9cedb8ee3e15a7955e7a698701a85b354bfbc3437bd43fd463e
font_02_sfnt_off00007fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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