Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad8bd698132d214…

MALICIOUS

PDF

78.2 KB Created: 2021-03-21 09:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c638b73840e7654b1e0b921d81227e7e SHA-1: 2cefe66b2f52ee538c0e3d322094e78fed57b5c2 SHA-256: 9ad8bd698132d214fde9c4c91ccc7cd78c53f110980de6da0c5f01834949a278
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The presence of external URIs and the overall structure suggest this document is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/wix?keyword=speckled+perch+bait PDF link annotation
    • http://contentmedialiteracy.com/pogalegejiwefokobaxpb537.pdfIn PDF document text
    • https://cdn.sqhk.co/fexejikexew/igwggOB/wosisebapidux.pdfIn PDF document text
    • http://fruitnaturs.space/43181216390w8tvf.pdfIn PDF document text
    • http://bnl-jobs.com/lokefavogumudukivomivix4p3qp.pdfIn PDF document text
    • https://jawifeguviweti.weebly.com/uploads/1/3/2/3/132302916/9877014.pdfIn PDF document text
    • https://vovasodakujex.weebly.com/uploads/1/3/0/8/130874601/delut-vesivevagasoni.pdfIn PDF document text
    • https://vamemaxodoj.weebly.com/uploads/1/3/1/4/131437173/viradamifufax.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/3311268.pdfIn PDF document text
    • https://cdn.sqhk.co/rizakumer/j2i9haB/90182596044.pdfIn PDF document text
    • https://nisaxiguxizi.weebly.com/uploads/1/3/5/3/135306566/tekefinupupasorakelu.pdfIn PDF document text
    • http://unonatur.space/fitbit_inspire_2_clipmu2bj.pdfIn PDF document text
    • https://cdn.sqhk.co/nikajovefer/hg1KQjd/ice_cream_mania_match_3_puzzle.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/5962560366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8af5617-c03c-4719-b359-7355846489ed/wpf_tutorial_microsoft_virtual_academy.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/what_are_the_prerequisites_for_the_camping_merit_badge.pdfIn PDF document text
    • http://dilezupuforew.epizy.com/tezudel.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/classic_journeys_africa_reviews.pdfIn PDF document text
    • http://sapovupiz.rf.gd/66205789897.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/88500831652.pdfIn PDF document text
    • http://vidabovon.epizy.com/la_casa_del_papel_soundtrack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e8becaa-aa80-494a-9968-635987e7e062/70769620305.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_off0000f54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54E 5288 bytes
SHA-256: b0aab2a1e0928ca5208b62fadb35837350ed675dc669257914a540a12bc442ef
font_01_sfnt_off0001073e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073E 10652 bytes
SHA-256: 435046fb97c4c70330801b7505de5a52dfe99626ba24a0d05dc1997b5c07730a

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