Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd7884f369b8704…

MALICIOUS

PDF

66.2 KB Created: 2020-11-22 07:01:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 63e3064a03c7f8e1279b7391fa19bd77 SHA-1: 6e9ec9be2631a7220b188ca6df081fddcc7e126e SHA-256: 7bd7884f369b87047efa61d82adc347385ba422e13f9538facee59cf55129cb2
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'Stick rpg complete download', likely a lure to direct users to malicious URLs.

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
  • 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://trafffi.ru/123?utm_term=stick+rpg+complete+download PDF link annotation
    • https://rusakubasarozu.weebly.com/uploads/1/3/4/2/134266120/japenumun.pdfIn PDF document text
    • https://kukefilatisila.weebly.com/uploads/1/3/4/4/134498126/dejex.pdfIn PDF document text
    • https://wirufaxiferid.weebly.com/uploads/1/3/4/5/134599318/sabixabamepanosekako.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/12237.pdfIn PDF document text
    • https://xesamubi.weebly.com/uploads/1/3/4/0/134095888/2613833.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/e455936afff229.pdfIn PDF document text
    • https://fevapeju.weebly.com/uploads/1/3/4/4/134468187/famitesabil-furapegit.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/nobidejaguwivawo.pdfIn PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/74e88eb3ff4c.pdfIn PDF document text
    • https://sisumojixidew.weebly.com/uploads/1/3/4/3/134355683/9068717.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/ced7873a-4d1a-4256-a1cc-f450a3b49add/earn_to_die_2012_part_2_hacked_unblocked_at_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f3d10be-b5f4-4016-b2db-c423ee4883be/29293152849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fdba427-7be6-4f05-a6ee-17ef2db8d992/rusido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9823bc7f-c0e0-48a2-9c09-94093bd87720/40583884148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad0d7a0-8d5e-45ba-8708-ea2ecbf408d4/tosigewapovose.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_off0000c46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46C 5476 bytes
SHA-256: 67cd796fc616b15ff7222b20eaffff5bb06697c7ae29c0f78544cec7f02b1aa0
font_01_sfnt_off0000d70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70C 10892 bytes
SHA-256: 103afaadd74e7477e2b25ef3c1f285864253784caefe512fd55e448d39ba8c75

Open this report in the interactive analyzer, or submit your own file for analysis.