Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce2bbae21ec1777…

MALICIOUS

PDF

65.7 KB Created: 2020-11-24 02:53:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1535e0987ffded1824aae646613f9a81 SHA-1: 1982c6a001d1e4bcaf5ba459d176f4d69ab691e7 SHA-256: 7ce2bbae21ec17777181ff3b7ef0f2b7fa283bbe9bdfda27d2dbc1237eaa0d0f
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded links, many pointing to disposable hosting services, and one critical link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to 'wifi deauther android'. The primary function seems to be directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=wifi+deauther+android
    • https://telavepifamika.weebly.com/uploads/1/3/4/3/134352802/5160054.pdf
    • https://wizawexixif.weebly.com/uploads/1/3/4/4/134472694/6784299.pdf
    • https://genamimiwovem.weebly.com/uploads/1/3/1/6/131636881/nesikidap.pdf
    • https://vukaxibunima.weebly.com/uploads/1/3/4/8/134885707/7cc38d000ee206.pdf
    • https://rizafoxuz.weebly.com/uploads/1/3/4/8/134852064/7014712.pdf
    • https://cdn-cms.f-static.net/uploads/4408704/normal_5f93b998ab2c7.pdf
    • https://laxomubidaxudov.weebly.com/uploads/1/3/4/4/134475580/4700322.pdf
    • https://jaxobowes.weebly.com/uploads/1/3/4/5/134591409/3c87ee7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lovetijif/terra_cotta_fragment_function.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_off0000bccf.bin
b71c9f6485097ae74ce191f74948e80dc2903c9a722fe47ca5d2d78c779f7311		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCCF 4796 bytes
font_01_sfnt_off0000cd24.bin
121a9ab0346e956f82ae6f0e038a9add19b05bdcd256cdd7ae7f382dd0550f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD24 2196 bytes
font_02_sfnt_off0000d723.bin
7eb06eaf4a92eb77cc6102da22c7eddb284be3a095c28e203d75013b84b917c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD723 10376 bytes

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