Malicious PDF — malware analysis report

Static analysis result for SHA-256 079bc152150246ad…

MALICIOUS

PDF

70.5 KB Created: 2020-11-09 19:00:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 94ecf95a825e173782316c036fd85690 SHA-1: 7cfd07a8e50b585da5e1384c8d1ed32dd8b089b5 SHA-256: 079bc152150246ad41f35ccc0e238f7571b57c5b865c83af320b34e1cc136bab
260 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to drive traffic. The 'SE_INVOICE_LURE' and 'SE_DOWNLOAD_BUTTON' heuristics suggest a social engineering pretext, likely to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/123?keyword=google+docs+checkbox+formula In PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/xalipubow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5f8f409e6260e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_5fa8cebc37481.pdfIn PDF document text
    • https://voledobaseju.weebly.com/uploads/1/3/0/9/130969813/4453284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424007/normal_5f9f28c475527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f9c695aee98b.pdfIn PDF document text
    • https://xidoferowugefu.weebly.com/uploads/1/3/4/3/134348033/nubodomi-reximasunojob-wujaf.pdfIn PDF document text
    • https://wofenexezut.weebly.com/uploads/1/3/4/3/134310974/dosifegasipates_bevadal_nexapubokagul.pdfIn PDF document text
    • https://pojetepanale.weebly.com/uploads/1/3/4/3/134361345/renuterukatat_wunariwiro_jerilurexi.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/dovulavavo/vefodiwofovinipedit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8a125d4-16e4-4e5b-b56b-7b5fc14504b0/wusijawosuvumikalinafadis.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/pawagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c14c9ce6-e093-49ba-8d1e-0c3e60c94df2/blue_star_quality_fishing_nets.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_off0000cb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB97 5736 bytes
SHA-256: 1b6f56b46613957b581dd2a7a11b5b9274f694a8ebaad22e0b39ed6a0d86d01c
font_01_sfnt_off0000def0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF0 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000e77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77E 10756 bytes
SHA-256: d31612a4356b39a0557ef62350224a8da0994898f2fb9e9a47fe924185ebf193