Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5b5f4ef434f4cad…

MALICIOUS

PDF

68.6 KB Created: 2020-12-06 21:26:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e87312695becd5ffc85f79a3c0a937f9 SHA-1: 2789acbfe376424c7bb20304ab7e7df3275f5a2e SHA-256: b5b5f4ef434f4cad2820a7ad15a526ff4381163d660c8ff81fe4edbf49225a62
96 Risk Score

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://traffking.ru/strik?utm_term=old+world+foods+potato+pancakes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410983/normal_5f9311db43dd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419194/normal_5fbce539ba7d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0c666116eb00e3c4b5099/t/5fc3e9e33570fb44d17b985e/1606674915916/physical_science_textbook_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38884280-c6a0-439a-b3a5-00afc803c810/9030458587.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea21e2fce462bc8c0024/t/5fc0f21c5147b1480455cd68/1606480412936/merufogotusof.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/panoxesezegebuje.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c3aad26ff1194f72fc70/t/5fc136f29d79364840b9a110/1606498042851/wedofibawijubomexi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b0fb8139af037665d853/t/5fc86e6ab0f45b2a3d25a5bb/1606970989320/83649283262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b9d3de-ec02-4ac1-bdf7-9fa34d74b671/laliredojoxuzosopasowar.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5729540f1034a5cc777a2/t/5fc85fe526a3037b4339fa5e/1606967269974/dj_booth_online.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/gulavata.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5bfcda3bf4b14abca621e/t/5fc672f461e25426e1165463/1606841076488/def_tank_capacity_2018_ram_3500.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_off0000cf53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF53 5332 bytes
SHA-256: 191b23c4340df4046a29e975f875c3b4bc43d0fb29141859af8f7f7121aa3a6b
font_01_sfnt_off0000e19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19B 10520 bytes
SHA-256: 344d005eb6b2c7ec4f6a7e1dc429b6e5e859c6a8ca60a8bbb08283bfd3f2304a