Malicious PDF — malware analysis report

Static analysis result for SHA-256 89091560c1cc862f…

MALICIOUS

PDF

73.6 KB Created: 2021-04-02 00:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ff59d0e7ef0e032e33f86fbeb6a51d3d SHA-1: 76d1f72c094c4c1cd2b842d59c4144527e5f38bd SHA-256: 89091560c1cc862f9f4fc6696ff3a26562a9da299282ce650151005786f0529f
126 Risk Score

Malware Insights

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

The PDF file contains an external URI pointing to a URL that mimics a search result for a document title. This URL is likely intended to redirect the user to a malicious site for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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 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://xajibur.ru/award?keyword=swot+and+pest+analysis+pdf PDF link annotation
    • http://7lessons.fun/56301303551xzx0t.pdfIn PDF document text
    • http://kudretbozaci.com/sugebamrs8p.pdfIn PDF document text
    • https://webimilosajepi.weebly.com/uploads/1/3/4/8/134859137/kudarovimuwuxud-dutitoza.pdfIn PDF document text
    • http://prizinsta24.site/liliponulivafefijarague1bmi.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/7672779.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/ebf5_secret_codes8ysrs.pdfIn PDF document text
    • https://butapakenora.weebly.com/uploads/1/3/1/8/131871909/bokut.pdfIn PDF document text
    • https://kesakoti.weebly.com/uploads/1/3/1/0/131070149/pumenusogajufejopeb.pdfIn PDF document text
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/gatomulaguzugejul.pdfIn PDF document text
    • http://insurancecarusa.com/186110676746whsb.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/68e08048-ceb9-4f37-bf6d-ec15a2610b07/zadiva.pdfIn PDF document text
    • http://kebenubes.onlinewebshop.net/driver_genius_professional_18_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/ford_mustang_ecoboost_review_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/kepatugisemetofuwefub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7fae853-14bd-4071-a7cc-2dbf8b68d018/86252708369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52f23822-0cb3-4658-bb8b-de1678091fec/docker_commands_with_examples.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/keystone_pipeline_oil_leak_in_north_dakota.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/54560693946.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_off0000e4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FF 5236 bytes
SHA-256: e4ea2f98c5ee731a94fde60aefc5ecf4ad0ee745ce6cfb7be4ebed931dcdcd6d
font_01_sfnt_off0000f6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FE 10000 bytes
SHA-256: 16c43bd62d0017fb93e97e5b5ead2e90ec0a207a9915dd0289217467e339eacd

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