Malicious PDF — malware analysis report

Static analysis result for SHA-256 1afbc5d56c341eb5…

MALICIOUS

PDF

68.3 KB Created: 2020-11-20 04:58:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1b3f74676def54e8ef8489d9cd83c204 SHA-1: dcd8fb4505bb28fe83375c1e2995d07f88eac6ab SHA-256: 1afbc5d56c341eb5dc183ef165e6e485624772d349a4fd07e3bf156c77c6da22
244 Risk Score

Malware Insights

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

This PDF document contains a large number of links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Sky factory 1 download', suggesting a lure to trick users into visiting these malicious sites. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or redirection campaign.

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
  • 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.
  • 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://ggtraff.ru/strik?utm_term=sky+factory+1+download In PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/5229935.pdfIn PDF document text
    • https://jatasurow.weebly.com/uploads/1/3/4/3/134358583/8cd48189a4744f2.pdfIn PDF document text
    • https://rikuwizixa.weebly.com/uploads/1/3/4/6/134685427/gipowezegepab.pdfIn PDF document text
    • https://jinezosibe.weebly.com/uploads/1/3/4/4/134454760/novupurevomeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_5fae267ea4016.pdfIn PDF document text
    • https://xeludelibiw.weebly.com/uploads/1/3/4/3/134371965/8882290.pdfIn PDF document text
    • https://beritugemob.weebly.com/uploads/1/3/4/3/134332724/2596560.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/494dc8.pdfIn PDF document text
    • https://febawamowezifu.weebly.com/uploads/1/3/4/5/134594075/fonixirera.pdfIn PDF document text
    • https://suludizivot.weebly.com/uploads/1/3/1/3/131383823/4167304.pdfIn PDF document text
    • https://wekegakusujesal.weebly.com/uploads/1/3/4/2/134266445/sudelozona.pdfIn PDF document text
    • https://tevitoretej.weebly.com/uploads/1/3/2/6/132680933/8788817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470232/normal_5fac018b8863a.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/741a5e46-f9fd-45a3-955a-9d01e88c2e96/16167457882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4bd436-12c4-4a86-a6d6-b2c6b1726637/indoor_volleyball_courts_near_me_free.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_off0000ce77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE77 5252 bytes
SHA-256: 762eed0912f9a2383c59bb09c8bf7d850250f3c09684a71c77142926266bfef8
font_01_sfnt_off0000e08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08C 10684 bytes
SHA-256: f0ed3a2e988239437d1569f0f05df488135ab412a9368d938b8031953cb191fd

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