Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60928f935fbae97…

MALICIOUS

PDF

80.3 KB Created: 2021-03-11 07:43:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0f0604350d3d7cb0744b5ca754ed3516 SHA-1: d80ad9a1911323d35df8fb1bb500cad8d28d01cf SHA-256: a60928f935fbae975b22fe9cbf15a72d0b90f04fcb33f7a3bccc433deb6d632e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=molecular+cloning+a+laboratory+manual+%2528fourth+edition%2529+ebook PDF link annotation
    • https://kepiloxuxamife.weebly.com/uploads/1/3/0/7/130740378/sunanew-nezejunejipisev.pdfIn PDF document text
    • https://gutazalofekeva.weebly.com/uploads/1/3/5/3/135395177/6848ad.pdfIn PDF document text
    • http://wiinorama.website/what_are_the_best_horror_movies_on_amazon_prime_right_now07xs6.pdfIn PDF document text
    • http://jologedeb.getenjoyment.net/paradiso_perduto_milton_download.pdfIn PDF document text
    • http://verification-help.com/288075683446nu0v.pdfIn PDF document text
    • http://kokusurajiguz.22web.org/zapf_calligraphic_801_bold_font_free.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/fluval_fx6_hose_diameter.pdfIn PDF document text
    • https://purowuma.weebly.com/uploads/1/3/4/4/134472698/1686244.pdfIn PDF document text
    • https://vofamebibefa.weebly.com/uploads/1/3/4/6/134694090/zunokisitiwo.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/80376611076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_602cf51b90bef.pdfIn PDF document text
    • http://vegogik.iblogger.org/vorinus.pdfIn PDF document text
    • http://duvazejezirofid.22web.org/que_significa_liderazgo_autocratico.pdfIn PDF document text
    • https://kodidorimo.weebly.com/uploads/1/3/1/3/131380292/076b0ddb04.pdfIn PDF document text
    • http://circus.market/8793493355jxyi7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445550/normal_6039ce6e8479d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xinudigiwuwa.epizy.com/verikazenojapenosu.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/to_kill_a_mockingbird_chapter_5_worksheet.pdfIn PDF document text
    • http://zovoxasus.rf.gd/mapa_bruselas_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/68818826025.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 5604 bytes
SHA-256: 991b4607c4d19705a9457e936637d96eca476cfca9943f6c78d52da5e6308143
font_01_sfnt_off00010023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10023 10696 bytes
SHA-256: 9f295b864c5b88851921144da69e1e38f88c208c1f776c4c733c8ea1fc551bd0
font_02_sfnt_off000124be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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