Malicious PDF — malware analysis report

Static analysis result for SHA-256 b646342c787c1ac2…

MALICIOUS

PDF

66.1 KB Created: 2021-01-15 00:04:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 752f320a72a104c3cff24d70bd1e86a1 SHA-1: 76252b946dcc7343ae3c96e77ac0adc15576a365 SHA-256: b646342c787c1ac2e8cbf7fe2a27d6c53688170eb9e19a973bd11c555d8166ce
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which redirect to potentially malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The primary malicious URL identified is 'https://traffking.ru/aws?utm_term=corresponding+sides+worksheet+pdf'. While no scripts were explicitly extracted, the nature of the link farm suggests an attempt to drive traffic to malicious sites, likely for phishing or malware distribution.

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/aws?utm_term=corresponding+sides+worksheet+pdf In PDF document text
    • https://cdn.sqhk.co/sofetarunox/YCrr1hh/jusonuxozovoturapofurexi.pdfIn PDF document text
    • https://cdn.sqhk.co/pelotuwew/Viixghe/1480395516.pdfIn PDF document text
    • https://toxoxazagole.weebly.com/uploads/1/3/0/9/130969938/3b8d847c2d5d6.pdfIn PDF document text
    • https://site-1168088.mozfiles.com/files/1168088/electric_guitar_sounds_in_words.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426679/normal_5fc3a85751e5b.pdfIn PDF document text
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/aa21ef.pdfIn PDF document text
    • https://site-1217191.mozfiles.com/files/1217191/jexiturovafonul.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/QgcqwiN/how_to_speak_english_fluently_free_course.pdfIn PDF document text
    • https://site-1195445.mozfiles.com/files/1195445/troll_face_quest_usa_adventure_2_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/jujdSVI/52311380802.pdfIn PDF document text
    • https://cdn.sqhk.co/nepodowu/8WFbKFM/valkyrie_profile_lenneth_android_apk_data.pdfIn PDF document text
    • https://cdn.sqhk.co/dewobube/mkVhdV4/galaxy_space_invaders.pdfIn PDF document text
    • https://site-1199794.mozfiles.com/files/1199794/universe_quotes_for_her.pdfIn PDF document text
    • https://site-1228379.mozfiles.com/files/1228379/wupesobovoduriz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/glacier_national_park_guide_service.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_off0000c62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC62E 5124 bytes
SHA-256: 097696578cbc75f2eabbc617c426057552146924e5eb30f1a909484e57c3e6d2
font_01_sfnt_off0000d7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B0 10484 bytes
SHA-256: 7f8086b86dcaee6d8489869e4815a5528331531f6633f9df83a50895340c47f8

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