Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19871a94f21e91a…

MALICIOUS

PDF

74.5 KB Created: 2021-04-02 00:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 621946653998dd28540978cc5a2e67c6 SHA-1: 172dcfb5e0313ad147fbf566f40754064803db9c SHA-256: f19871a94f21e91a5f65618e4a7c0715ec20bd60d1477e21b9c2a6826e459fcc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://midufefew.ru/strik?utm_term=how+to+download+scapy+in+kali+linux PDF link annotation
    • https://cdn.sqhk.co/zegofurop/hAyihfP/utter_amazement_synonyms.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/gehfgdS/veruzozapugitiw.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/a59jeD6/41430491278.pdfIn PDF document text
    • https://cdn.sqhk.co/salujokep/hapjhap/43646878450.pdfIn PDF document text
    • https://cdn.sqhk.co/girolivudafo/cgeK6oA/nupezolovidavekolufe.pdfIn PDF document text
    • https://cdn.sqhk.co/pifixijowoka/gh0PBda/styledoll_life_3d_avatar_maker_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/sopaluwokaja/fhgjhVg/water_slide_downhill_rush_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/64Wifge/w3schools_javascript_alert_method.pdfIn PDF document text
    • https://cdn.sqhk.co/rowagana/63rVFhc/22993150870.pdfIn PDF document text
    • https://cdn.sqhk.co/gagupibi/xjdyBhe/nomelifakelewikiwuk.pdfIn PDF document text
    • https://cdn.sqhk.co/dekorasenu/iga3rir/brain_work_physics_puzzles_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vujuzira/Wrhfwhi/53270052327.pdfIn PDF document text
    • https://cdn.sqhk.co/nakotuba/cjd6hhb/78464686470.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/4003192b-9ed0-4226-a9b2-a4ebd7d50d30/35362235459.pdfIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_5d505a4a6a31470bb8ba53e980a527f2.pdf?index=trueIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_607a4ac24dcc44d982192372f4c6d343.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/deb88a02-dedc-47b7-a2b7-d1e38cbc52a3/3221168317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c813987-7a80-41bc-b1d4-69760837fba0/japugozatizin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d46c23cb-73ca-4e02-88c5-0fbf4fec4812/young_living_everyday_oils_essential_oil_collection.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_off0000e44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44C 5260 bytes
SHA-256: 39ea0cad00c833b27c3b532787aca7edde276f2ee0ad255fa49a18abfda2cbb9
font_01_sfnt_off0000f65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65B 11040 bytes
SHA-256: a7bccc1f7742145995bca56c424a47776abfb2591c78da51cef2b773e80d8954

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