Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e4867eee670c68…

MALICIOUS

PDF

74.0 KB Created: 2021-02-10 17:33:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6ccf2a013860ef4ab543260060aca066 SHA-1: 52996dfb52321c5350a1f29825575b8eb3eb1a66 SHA-256: 36e4867eee670c68721df970aa2b52d124bd4586e56c2c37b33e937330517f30
192 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by a critical heuristic as a malicious redirector, pointing to the URL 'https://yafferge.ru/123?utm_term=far+aim+2017+download+free'. The document also contains urgency language, suggesting a phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://yafferge.ru/123?utm_term=far+aim+2017+download+free In PDF document text
    • http://formulamoney.top/cdr_to_jpg_converter_software_freeucvxo.pdfIn PDF document text
    • http://titoto.xyz/100_cotton_full_fitted_sheetyu00s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_602195f8ab455.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/312665786143gs7u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379744/normal_5fcfaaef176e9.pdfIn PDF document text
    • http://kittyplay.online/82647075869yobz1.pdfIn PDF document text
    • https://tonulaluxi.weebly.com/uploads/1/3/4/0/134099082/2652404.pdfIn PDF document text
    • https://sonikegusu.weebly.com/uploads/1/3/3/9/133997348/d1dbe1f4e4df22.pdfIn PDF document text
    • https://mokaredoraxo.weebly.com/uploads/1/3/4/0/134095924/bixedixofuxew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496165/normal_5fd339d688d30.pdfIn PDF document text
    • https://guvorike.weebly.com/uploads/1/3/4/2/134266232/ce8cedd5f7151e.pdfIn PDF document text
    • https://cdn.sqhk.co/wazilisiko/ePmDNpr/49717558149.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/5933125308ab6a.pdfIn PDF document text
    • https://cdn.sqhk.co/mitajaso/eJI3ia3/hot_deals_4_less_amazon.pdfIn PDF document text
    • https://kazajibabagak.weebly.com/uploads/1/3/4/4/134467412/738abeaee68.pdfIn PDF document text
    • https://cdn.sqhk.co/koxuzofu/jjiaxjc/35729130708.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/biaidia/dibimizedegabiwexa.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/xeponodij/8_times_table_division_facts_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/laxawemefibagiwireruf.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 5328 bytes
SHA-256: 4a7ef41357b3390d73ba1865bc0dca916f4b1880b54f9178862bec3b357a24fd
font_01_sfnt_off0000f49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49E 11252 bytes
SHA-256: 891d3a5cd458ba3a230d7180fd4bb8bbf94d8b48f169f3754eec1ed31f6f7b04

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