Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28d6dac5373aa4d…

MALICIOUS

PDF

65.9 KB Created: 2020-11-17 23:32:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a92f251dc81879c723ac4555d0620d88 SHA-1: 2eb1db7d05ef620b0f35f8fb4b32b04a4521ff2f SHA-256: b28d6dac5373aa4da5f0e5d312578478ad5b25a0854352ddfd89bd0bc214fb76
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/strik?utm_term=dell+latitude+e6530+drivers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415525/normal_5f9b753c97b92.pdfIn PDF document text
    • https://guvodirafed.weebly.com/uploads/1/3/4/4/134475496/8adb28eecda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368226/normal_5f87a07465aea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486036/normal_5fb2fc7cd24cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_5fa5d20d79bf0.pdfIn PDF document text
    • https://miwunukeje.weebly.com/uploads/1/3/4/5/134524605/vuvax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2173fe2f-3b17-4629-a2c5-8af7916e38ca/begrijpend_lezen_groep_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f8d1829-6c43-4fe5-ac4e-1a9c650de46b/tara_maclay_fanfiction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a183db-00be-49ff-808e-c146dd3ef500/66101916517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/305def85-2712-46c8-8d34-ff6b0e96dd02/tongue_fu_szl_dv_sanat_-_sam_horn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d01eccbd-cd8d-46b2-b4a2-b12f209849dc/iptv_pro_apk_channel_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55200f2b-f04d-4d85-b267-088e5a68f8ea/kinamemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7765522-9d07-481e-8452-0eb024b52d4b/33574031381.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_off0000c11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC11B 5464 bytes
SHA-256: 52e23ff9e43bc5586a4128e6bc307b684edfcdfc93c761307329c2a9ab695053
font_01_sfnt_off0000d3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CA 13336 bytes
SHA-256: 923274eca4fb9aa3180fc6566afdae422ea65ee5d82b2553ca9019c8613b6b1a

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