Malicious PDF — malware analysis report

Static analysis result for SHA-256 700d5976aa98b2a3…

MALICIOUS

PDF

35.9 KB Created: 2020-10-31 22:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 60e2c68b0c15d085692ef230d75de25c SHA-1: 318b3649ef559c7cf8134996ee20facb13a1a8f1 SHA-256: 700d5976aa98b2a31bfaf0ef495d4f7668cb56b9641161ec6c7e8b095d833750
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link disguised as a search result for "Berkeley county gis mapping", which redirects to a known malicious URL. This indicates a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=berkeley+county+gis+mapping In PDF document text
    • https://gawubodukajine.weebly.com/uploads/1/3/0/9/130969599/4218041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_5f8bbc554b621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_5f8b4416bf734.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/8425062.pdfIn PDF document text
    • https://bufazori.weebly.com/uploads/1/3/4/3/134377245/relanexegajup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f8c7253746bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5f90e6b255355.pdfIn PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/riwiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e618d040-a139-43b3-be5f-ce7ed1bcbb96/75202303466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0166/5463/files/conduction_convection_or_radiation_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9327/7854/files/6202771955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b8e1c49-cecc-429f-b35a-d3bc35e06e90/kutagebofigolojejukalexip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9270/3915/files/old_school_rs_fletching_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a87da22-47af-43f4-9e6c-68fdb44f8128/wilden_m8_pump_rebuild_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c5a67e-41fa-43a4-aade-795da00a8190/72349124508.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_off00004dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DC7 5468 bytes
SHA-256: bcce06308d4bbe4ab82507071eca95ff9172c428fa48ca33581dd1bdb69eace2
font_01_sfnt_off00006061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6061 10740 bytes
SHA-256: 83be9420f15348d0e9151657d1329cee5c4a74dbade43a660d7e36d5242a487b

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