Malicious PDF — malware analysis report

Static analysis result for SHA-256 48f200af2a420a21…

MALICIOUS

PDF

66.2 KB Created: 2021-01-14 11:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d79d1b361fe70909d05c4f200ce4a7b2 SHA-1: e73ff70e0db376c4130c51d3bd38c19ed0592f5f SHA-256: 48f200af2a420a214f0540e582707bebc3722844ea83727b8d70a19c38f5b5c2
244 Risk Score

Malware Insights

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

This PDF document functions as a link farm, embedding numerous URLs that redirect to external websites. The primary heuristic firings indicate that these links lead to known malicious redirector infrastructure and are part of a disposable link farm strategy. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to direct users to malicious content or phishing sites, likely as part of a broader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffking.ru/123?utm_term=mopar+manual+steering+box+adjustment In PDF document text
    • https://nogiwesetegi.weebly.com/uploads/1/3/1/6/131637024/dewejopejusefupakisu.pdfIn PDF document text
    • https://site-1177214.mozfiles.com/files/1177214/simolebebezorulosu.pdfIn PDF document text
    • https://site-1166752.mozfiles.com/files/1166752/electromagnetic_fields_textbook.pdfIn PDF document text
    • https://site-1171482.mozfiles.com/files/1171482/jamuzofora.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381748/normal_5fccdeeeccc7d.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/4289288.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/xineroxixogase.pdfIn PDF document text
    • https://xexiwimelogodit.weebly.com/uploads/1/3/4/5/134593193/lejarawenukot_luwikagel_nozut_ginatovewe.pdfIn PDF document text
    • https://site-1200376.mozfiles.com/files/1200376/buckwheat_flour_nutrition_information.pdfIn PDF document text
    • https://likivaduzizi.weebly.com/uploads/1/3/4/6/134699319/4824423.pdfIn PDF document text
    • https://kezagoguz.weebly.com/uploads/1/3/4/1/134131769/turabununemux.pdfIn PDF document text
    • https://site-1173778.mozfiles.com/files/1173778/pocket_crafter_town_safe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E9 5568 bytes
SHA-256: 904c9fdf1872901f5f429fdb967be5cbad2d5c6a9f491a8d8822d7ec3e216dfd
font_01_sfnt_off0000d8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C9 10368 bytes
SHA-256: 3a33917dd5517c618b16a5c21fca88f455c4938c5ce763f83ed3bb4e55f62b89

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