Malicious PDF — malware analysis report

Static analysis result for SHA-256 80fba1c10ba3684c…

MALICIOUS

PDF

70.2 KB Created: 2020-12-18 07:17:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 736d5db6b1ca18ec60f20ed159b906f3 SHA-1: e0d5e9c65d8ed65660fadb4e5dbd38f95519045c SHA-256: 80fba1c10ba3684c03902872f6ec59dc3393df65dc4f7826ebe5509966c964d4
214 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains keywords related to a product, suggesting a lure. The presence of multiple external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/123?utm_term=bosch+power+box+subwoofer
    • https://static.s123-cdn-static.com/uploads/4448100/normal_5fc52ec2151d9.pdf
    • https://cdn-cms.f-static.net/uploads/4477864/normal_5fc24e5544d61.pdf
    • https://cdn-cms.f-static.net/uploads/4460449/normal_5faecacc4e85c.pdf
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/jizikijegare.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nedijowewoded/nawedezelijomunubasigutu.pdf
    • https://s3.amazonaws.com/rivazixexuguri/congressional_research_service_reports_2018.pdf
    • https://s3.amazonaws.com/pujinit/kahoot_bot_chrome_web_store.pdf
    • https://s3.amazonaws.com/kibavutibeved/first_reconciliation_catholic.pdf
    • https://s3.amazonaws.com/wikurixobelu/22273868189.pdf
    • https://static1.squarespace.com/static/5fc2973917e7202640f4fd6f/t/5fc68486bc819f1cf4ba9d8e/1606845576392/dinos_online_jurassic_mod_download.pdf
    • https://static1.squarespace.com/static/5fc4c77ac89e1c4b8fd772ad/t/5fcda2768a55f2188b939ee6/1607311993666/garmin_mini_dash_cam_mount.pdf
    • https://s3.amazonaws.com/sizadagazagaj/91544568295.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d60a.bin
c53ee9f8b822828c92c2e75ecdef785917362f5e5527e62d3f2b3b1fee040a44
pdf-font-stream PDF embedded font (sfnt) at offset 0xD60A 5208 bytes
font_01_sfnt_off0000e7dd.bin
2ca1bbc4b2dd9f826414fedb100b4b3628f2d8a74b0474edd008981c3248b7de
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DD 10648 bytes