Malicious PDF — malware analysis report

Static analysis result for SHA-256 2015644bac3e2284…

MALICIOUS

PDF

68.6 KB Created: 2021-02-22 16:25:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0a878ee74e3e073695a8bb335c7f1eb0 SHA-1: 547074c77cb97d031e3a5519e96b94326ec0f7a6 SHA-256: 2015644bac3e2284694c12a4a8074cf66a15c46a2e29a7e92de91cd77d3e7388
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one specifically identified as a link farm on disposable hosting, suggesting an attempt to redirect users to potentially harmful content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

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://seumenha.ru/wix?keyword=english+reflexive+verbs+exercises+pdf PDF link annotation
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/kefikukib-semirosutepug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380383/normal_5ffba09d2ab77.pdfIn PDF document text
    • http://musc-media.xyz/8945609611818mij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484609/normal_6013ea52b7567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473632/normal_601e019cadf95.pdfIn PDF document text
    • http://fesilax.22web.org/anusandhan_movie_all_song.pdfIn PDF document text
    • http://xuponigivixi.66ghz.com/what_does_period_blood_colors_mean.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456121/normal_601ec364f2e99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475212/normal_6007b9c232b5f.pdfIn PDF document text
    • http://xenuven.22web.org/potato_osmolarity_lab_report_ib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390664/normal_5fec428197eb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452593/normal_5ff2ae02e72be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372702/normal_5ffd1dcce4920.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://werufofewusil.epizy.com/gedasesunupojofonig.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/80509789426.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/fukameval.pdfIn PDF document text
    • http://nufagogofuj.epizy.com/gitubuxajare.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/instagram_photos_app_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/jolunowugifalu.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_off0000d0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DE 5432 bytes
SHA-256: ad4a5ed627e8cfe10a138fe3456810cd2343fa1c1199df2dc2525f10ecea4e01
font_01_sfnt_off0000e360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE360 9924 bytes
SHA-256: 8d7db795eeff682951948bfc1cdc2f2067ce181b310e9f67a7fc53bbcde5a313

Open this report in the interactive analyzer, or submit your own file for analysis.