Malicious PDF — malware analysis report

Static analysis result for SHA-256 60dbe33eb43e9652…

MALICIOUS

PDF

76.2 KB Created: 2021-05-30 20:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3fad74f2d6af03a28809c2695fa10f8e SHA-1: e0a73dc2835a3f7d6b872b9816888c152a384623 SHA-256: 60dbe33eb43e9652ed681bb81125d4c0304ffe8b2a73e0996614d58f9db8c070
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The embedded document body, though heavily obfuscated, contains text related to tutorials, which is likely a lure to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://nipisod.ru/strik?utm_term=tutorial+corel+draw+x6+pdf+bahasa+indonesia PDF link annotation
    • https://fugesozuxi.weebly.com/uploads/1/3/0/7/130739141/8507547.pdfIn PDF document text
    • https://kujepilam.weebly.com/uploads/1/3/5/3/135343620/a42aaf12d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_5fd85bef17160.pdfIn PDF document text
    • https://xivixomepovi.weebly.com/uploads/1/3/4/5/134518427/f0927479f855bf.pdfIn PDF document text
    • https://milonotupilo.weebly.com/uploads/1/3/5/3/135347339/6248219.pdfIn PDF document text
    • https://rojimabilaraxum.weebly.com/uploads/1/3/5/3/135314729/7c88810.pdfIn PDF document text
    • https://kaxobemux.weebly.com/uploads/1/3/4/6/134676595/575328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491925/normal_5fd160735a81c.pdfIn PDF document text
    • https://kedifekutijita.weebly.com/uploads/1/3/4/7/134713117/likojavegopevugadepe.pdfIn PDF document text
    • https://letimetijomez.weebly.com/uploads/1/3/1/4/131454560/702ba729f634d3.pdfIn PDF document text
    • https://linobajeg.weebly.com/uploads/1/3/4/4/134489040/15367c1e51a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481275/normal_606022e81593a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405181/normal_5fd13c9a38e7a.pdfIn PDF document text
    • https://kagunalikabogow.weebly.com/uploads/1/3/5/3/135350350/66b9bf5855.pdfIn PDF document text
    • https://vudexugir.weebly.com/uploads/1/3/2/7/132710723/6b4b9.pdfIn PDF document text
    • https://sedezexe.weebly.com/uploads/1/3/4/3/134342112/ce91a0f0afc657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390330/normal_606e482d12073.pdfIn PDF document text
    • https://xoluvujotu.weebly.com/uploads/1/3/1/0/131070376/cc3838cd414e56.pdfIn PDF document text
    • https://merebidoso.weebly.com/uploads/1/3/4/3/134344951/f7c86aff462334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380674/normal_6049304fc65ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491969/normal_5ffae849cf64f.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/489709db-939a-44ea-877e-8037cdfa024f/what_can_alexa_do_thats_funny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0685004-3bb8-4a4c-9741-5397b3200ba1/67510391085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b310c9e7-0853-4abe-b375-d1a79a66b298/78504015600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60ae1845-a1bc-4c0c-bbf8-aac680195011/84779401933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f10fba-73f7-46b6-af28-4a6965cf8ca7/larin_3_ton_floor_jack_manual.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_off0000eb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2E 5644 bytes
SHA-256: 56290956b539141b1167014790a0359d4c35ae36ac65594214d98ff28ab1f939
font_01_sfnt_off0000fe64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE64 10180 bytes
SHA-256: 5695e551e83f80d4430c0f9904c43fd5d46c3be2a7ec4b6813b81d7be9e8e272

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