Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c3682aac08db9a…

MALICIOUS

PDF

74.9 KB Created: 2021-06-01 16:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e14e7c5f3113af8fb21263fdb60d26c3 SHA-1: debbd89874e509f75877ff3b21fa6d78aaac0129 SHA-256: 48c3682aac08db9a7c24b997dda06d0602d96d171a003c111d89fa71e90ed539
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to obscure the true destination of the user. One of the embedded URLs, 'https://philabc.ru/pbw?utm_term=free+download+driver+printer+canon+lbp+6000+for+windows+7+32+bit', indicates a lure for downloading printer drivers. No scripts were extracted, but the PDF structure and link farm indicate a phishing or malware distribution attempt.

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
  • 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.
  • 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://philabc.ru/pbw?utm_term=free+download+driver+printer+canon+lbp+6000+for+windows+7+32+bit PDF link annotation
    • https://nokesopupikes.weebly.com/uploads/1/3/4/7/134767934/7594d23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485823/normal_6050c978c7172.pdfIn PDF document text
    • https://nepufetok.weebly.com/uploads/1/3/1/4/131438640/0fc814c.pdfIn PDF document text
    • https://paniwotipetusu.weebly.com/uploads/1/3/4/6/134614288/zetidikofaxez.pdfIn PDF document text
    • https://kojozoxilasa.weebly.com/uploads/1/3/5/3/135302893/302861.pdfIn PDF document text
    • https://roluliduz.weebly.com/uploads/1/3/4/7/134771057/0369014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477387/normal_6010b690115b1.pdfIn PDF document text
    • https://gesogakit.weebly.com/uploads/1/3/4/5/134581759/zoxusujar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392649/normal_605aa6d84d94a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_605d2e9e2ac69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478414/normal_5fdbab71902fa.pdfIn PDF document text
    • https://sizigemud.weebly.com/uploads/1/3/4/6/134606095/xijasudojoduser.pdfIn PDF document text
    • https://badazunezibak.weebly.com/uploads/1/3/5/3/135338398/6e4d85.pdfIn PDF document text
    • https://gepinizidewepi.weebly.com/uploads/1/3/4/3/134305752/jojodezapebof.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4420752/normal_60b0072660007.pdfIn PDF document text
    • https://liberiloro.weebly.com/uploads/1/3/4/5/134589576/25f33108e75.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4367624/normal_60b20c653a22c.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://uploads.strikinglycdn.com/files/f4fe49d4-00c8-42b2-ba9f-84f49278e951/netgear_prosafe_jgs524e_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46826f43-fd93-4e54-860b-7391e5e1e149/john_deere_425_mower_blades.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD891 5856 bytes
SHA-256: 0804da044350c4d7ab238644bffd6ba89a2da2e4d06ba14b2bc502adc6ae6de8
font_01_sfnt_off0000ec99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC99 10360 bytes
SHA-256: ea9f99d97f693d991034e2f77cf3902f76cc46443a26cebff5c7fae603808a18
font_02_sfnt_off00010fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3