Malicious PDF — malware analysis report

Static analysis result for SHA-256 1860501ede2a28c8…

MALICIOUS

PDF

83.9 KB Created: 2021-02-28 09:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: db98c9b99af055bef6075014a81e69ad SHA-1: d4d2d8681bc2d19105db90704ebfd1ff2a671d65 SHA-256: 1860501ede2a28c855756de25f3e0ae51d638c9bac2a7b78fe76f6ddd2d7d1d8
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs are used to redirect users to potentially malicious content, and the document body's mention of a 'French English dictionary for iPhone' serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • 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
  • 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://xezojetit.ru/aws?utm_term=french+english+dictionary+for+iphone PDF link annotation
    • https://zonulufeviwupaz.weebly.com/uploads/1/3/2/8/132814448/2832952.pdfIn PDF document text
    • https://baveretam.weebly.com/uploads/1/3/5/3/135314503/nisak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409607/normal_5fed3d6f7e913.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498345/normal_5ff0b29706194.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_6028bbe5cfc9e.pdfIn PDF document text
    • https://tumizoma.weebly.com/uploads/1/3/2/8/132814974/dasuzixamovirob-jevemelefasetu-kesifuz.pdfIn PDF document text
    • https://nupimixek.weebly.com/uploads/1/3/2/7/132712066/witiwozajipoz-laxixo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493209/normal_5fdf98c72114a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_601d5d6e65265.pdfIn PDF document text
    • https://lakowabanitewot.weebly.com/uploads/1/3/4/8/134898259/a130d764653.pdfIn PDF document text
    • https://kowelisabames.weebly.com/uploads/1/3/1/8/131857626/239189.pdfIn PDF document text
    • https://dolopexoje.weebly.com/uploads/1/3/1/8/131872138/kubox-pozipopo-fowexog.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5A 1768 bytes
SHA-256: 7b9c1ad248dcaef01c7adb4df71c22141da68cde87cc5ccff7cadb2d821898f4
font_01_sfnt_off0000f300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF300 5472 bytes
SHA-256: 20f6f5ee6825843ea64dd153071c2bff10093bb3521a6e1384d5480f1f923e1e
font_02_sfnt_off000105ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AC 11600 bytes
SHA-256: d872c22e04622946b10e7435c19f070381995c3047184c03e0ae7aba542711be
font_03_sfnt_off00012d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D50 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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