Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c2f373121f2892…

MALICIOUS

PDF

72.2 KB Created: 2021-02-22 00:32:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: eef11c69644ae287d7cf1c5d82b88884 SHA-1: 452e26c211ac4a99efef1284cea8bb2825fad9c2 SHA-256: 14c2f373121f289291c096ac5b5efefc53ef625da954abf3b79d1a6ab4050577
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/123?utm_term=how+to+calculate+reliable+change+index+in+spss'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are likely part of a campaign to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=how+to+calculate+reliable+change+index+in+spss In PDF document text
    • https://cdn.sqhk.co/nuvexajamu/ii7l4jj/99140327662.pdfIn PDF document text
    • https://luvagifewu.weebly.com/uploads/1/3/4/7/134766249/lepirabi.pdfIn PDF document text
    • https://kenafidoragakox.weebly.com/uploads/1/3/1/8/131856022/9702113.pdfIn PDF document text
    • https://tamegafatukof.weebly.com/uploads/1/3/4/4/134400059/rizegiwujavef_xuxawolegigoru_gabizolapeselag.pdfIn PDF document text
    • https://siwevamad.weebly.com/uploads/1/3/1/8/131871433/levurotigonug-pevivisekawuza-suzesaforup-gazolibip.pdfIn PDF document text
    • https://cdn.sqhk.co/mobixipotex/jhghjhe/tosusiti.pdfIn PDF document text
    • https://latiniwujuxemuw.weebly.com/uploads/1/3/3/9/133997677/jenekurixarugufikab.pdfIn PDF document text
    • https://kovovovugatu.weebly.com/uploads/1/3/4/5/134599685/babisozedibenixa.pdfIn PDF document text
    • https://jeletaru.weebly.com/uploads/1/3/5/3/135321400/zaxizode.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/mejobu/91919345750.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/chapter_11_introduction_to_genetics_section_review_11-2_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/reportage_famille_nombreuse_tf1_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/herpes_treatment_guidelines_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/ancient_egypt_breakout_answers.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_off0000db4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4D 5596 bytes
SHA-256: cab9cb65b63be6974461400f18a5e8380eecac6d796bc921c958e30c205f7ab0
font_01_sfnt_off0000ee59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE59 10996 bytes
SHA-256: 80b587a7a56d7f2febb1f412949ef891f57ba922eb983a9839f249ea90962ef5

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