Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e42f7c30b8a0ce6…

MALICIOUS

PDF

72.6 KB Created: 2020-12-06 03:55:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 350b2f33527a4a7a5e1b86126a0b1e99 SHA-1: 1c7f8b395a2c50d41d5699ad6aed1006339d38ae SHA-256: 7e42f7c30b8a0ce6f1b9989cd76e039e4c2a34acfaac8f9c60a1614cfb01053f
214 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by multiple heuristics and an ML classifier. It contains a large number of embedded URLs, many of which point to link farms and redirectors, suggesting an attempt to lure users to malicious sites. The presence of a link to a known malicious redirector infrastructure further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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?utm_term=ge+ice+maker+not+making+ice+bottom+freezer
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/b7f24925a725b.pdf
    • https://jefogozadiz.weebly.com/uploads/1/3/4/0/134040800/2465455.pdf
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f8742303b5fd.pdf
    • https://cdn-cms.f-static.net/uploads/4385216/normal_5fa113a5c831e.pdf
    • https://static.s123-cdn-static.com/uploads/4473656/normal_5fcc253aa7847.pdf
    • https://julupovopanar.weebly.com/uploads/1/3/4/7/134732987/wivopibe-kajugamu-gunov-keteresofoxe.pdf
    • https://cdn-cms.f-static.net/uploads/4415291/normal_5fb6ba45cde31.pdf
    • https://static.s123-cdn-static.com/uploads/4453334/normal_5fc7a7ff4aed0.pdf
    • https://cdn-cms.f-static.net/uploads/4409411/normal_5f958740cc8de.pdf
    • https://cdn-cms.f-static.net/uploads/4377377/normal_5f8a79c6dfd2b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fc285aae5c7695ca9a5ff19/t/5fcad5eb26a2be7f6dd76f2c/1607128556870/paypal_stock_ticker_symbol.pdf
    • https://static1.squarespace.com/static/5fc0e08512facd59ceacd9cd/t/5fc103c261e25426e15c16b4/1606484931690/53508966830.pdf
    • https://static1.squarespace.com/static/5fc2bcd488c99b6d37b321ee/t/5fcc1eab978da30c56ed1dbd/1607212717528/the_third_day_review_av_club.pdf
    • https://static1.squarespace.com/static/5fc0d7dc3dfdd95b60d4c91c/t/5fc17e9861e25426e170c611/1606516376601/13769128833.pdf
    • https://uploads.strikinglycdn.com/files/f0ed1469-2c03-4bff-8dad-5b86f5d9b046/15619614143.pdf
    • https://static1.squarespace.com/static/5fc6e2a348c1673e559972c0/t/5fc831c626a3037b4332737e/1606955462711/t_mobile_deals_for_existing_customers_2019.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d269.bin
c46b1a53e95944cbfbd9c5639e3fe1c31c168349608aaf9108a85bc366489aa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD269 5064 bytes
font_01_sfnt_off0000e396.bin
59034030597f7140cb4d877319488f8253864377a7c239e036a03430300b2789		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE396 10460 bytes
font_02_sfnt_off00010724.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10724 4324 bytes

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