Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12d6cd9c65e81fd…

MALICIOUS

PDF

78.5 KB Created: 2021-03-20 22:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 81dc0f0a1a0995309e5b81cc0d7f579b SHA-1: 91415c87391747fa9fba4baeb5a676b8a6ce1954 SHA-256: f12d6cd9c65e81fdc34d6ee03ebf56496d0e7027fa838cb83ba283ff45e0cbca
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, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains a title related to forklift licenses, which is likely a lure to direct users to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/aws?utm_term=how+much+does+it+cost+to+get+my+forklift+licence PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471686/normal_5ff9d89198fa6.pdfIn PDF document text
    • https://nexiwurepefisov.weebly.com/uploads/1/3/4/3/134372078/cab95ecd54.pdfIn PDF document text
    • http://botumizesakukij.iblogger.org/36907406762.pdfIn PDF document text
    • https://siromalad.weebly.com/uploads/1/3/5/3/135312661/megetit.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/7c59ddbcdac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476429/normal_601d127dce542.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480594/normal_604ba2c1c2a52.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_b74d9f7bc8724445a3364e38e29fdbc7.pdf?index=trueIn PDF document text
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_d15e06f9b18843539024f13041bc3e33.pdf?index=trueIn PDF document text
    • https://eda93683-a6ca-45e9-8056-ca7adea7f1dc.filesusr.com/ugd/d655db_36b4468b0aff43fdbc0923ca0da83108.pdf?index=trueIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_e2a6f4fb46a940e9a24ce7da53130f2c.pdf?index=trueIn PDF document text
    • http://febejesibek.rf.gd/danasevulamumizidolizibu.pdfIn PDF document text
    • http://fekunowan.epizy.com/need_you_now_free.pdfIn PDF document text
    • http://lejamezi.rf.gd/how_to_calculate_standard_normal_distribution_without_table.pdfIn PDF document text
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_f55dec59b12f49498b87170fde7bca52.pdf?index=trueIn PDF document text
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_abf1c22c844f402ab654373385781268.pdf?index=trueIn 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_off0000f3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C9 5444 bytes
SHA-256: a2e939a6c1f5a230dff286054a1393434cd09e522d6f84c04c716845a33919f3
font_01_sfnt_off0001063e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063E 11348 bytes
SHA-256: 16d8dc807c5801da03d99c54f9b588b53b8c5714680ca9010387193b43f5cbc0

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