Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fa1e68dff1ad77…

MALICIOUS

PDF

86.0 KB Created: 2020-12-27 04:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 27511f9b7b6ad1ddbbe2c7b49f0cf2ad SHA-1: 19d0efca267111e3c643c9e02b5fedb270230bb1 SHA-256: 49fa1e68dff1ad7789f5851ee2f7bdcc11e7197db46674b4ed9b846bc2d9b62c
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains keywords like 'Fever basketball aau' which, combined with the heuristic firings for 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM', indicates a likely attempt to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • 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/strik?utm_term=fever+basketball+aau In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391008/normal_5f9d748c743a4.pdfIn PDF document text
    • https://femodamokej.weebly.com/uploads/1/3/4/5/134529999/177766.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455645/normal_5fc74b6094644.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448337/normal_5fe4fe467314f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486565/normal_5fba13bf0ca14.pdfIn PDF document text
    • https://zunitilamurako.weebly.com/uploads/1/3/4/5/134529552/vojofoxuragokodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5f8acc3fe90e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/basketball_jersey_template_psd.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/kizuvilafibarabawopisow.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/bali_dance_performance_ubud.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/bsc_1st_year_mathematics_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/astm_a532_class_ii_type_b.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE8 4516 bytes
SHA-256: e18a8e3516f729f646718042576d4b9fdafc7b30c953f913f20e3c3bb01a973f
font_01_sfnt_off0000eb50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB50 7224 bytes
SHA-256: b797edb7244bfe36e0b7ed11bec7936aa5addefbaca5596823b38c65167ca576
font_02_sfnt_off0000ffd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD4 11608 bytes
SHA-256: fdb21729a6d2644475e9b5de1ce95525a529b23cf335eb7a514b7d54691c700b
font_03_sfnt_off000127a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A2 16168 bytes
SHA-256: 8c1e3298cb301b6aa2c2aeff0a89e1cafee6626e56d5ffa98ad52a7598c40df9
font_04_sfnt_off00013ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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