Malicious PDF — malware analysis report

Static analysis result for SHA-256 c566a68100798707…

MALICIOUS

PDF

80.5 KB Created: 2021-02-20 19:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 36bda79f6c783d8e773281e70659a17e SHA-1: b0b446cb10af84778c96aa4d60342c9f4712897e SHA-256: c566a68100798707b83a60b785ca399a03ef6509a244c07643a107ae425596c8
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs, such as 'https://jottigo.ru/strik?utm_term=public+relations+job+salary+canada', are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://jottigo.ru/strik?utm_term=public+relations+job+salary+canada PDF link annotation
    • https://tibiwoxot.weebly.com/uploads/1/3/4/8/134881218/luwalef_tupox.pdfIn PDF document text
    • https://jaluzirilunotu.weebly.com/uploads/1/3/2/6/132681851/japupozi.pdfIn PDF document text
    • https://cdn.sqhk.co/komilede/ig20jgb/zombie_objective_mod_apk_free_download.pdfIn PDF document text
    • https://gosabejeda.weebly.com/uploads/1/3/1/4/131453015/pesox-maduwezonemoxe-nixatibosewez-webatevegoxifud.pdfIn PDF document text
    • https://tesajezu.weebly.com/uploads/1/3/1/4/131452821/sorefetesib_jowiv_magixa.pdfIn PDF document text
    • https://vepovipozo.weebly.com/uploads/1/3/4/4/134472033/7dc75b.pdfIn PDF document text
    • http://wei-nmvc.com/e-marketing_techniquesggnkp.pdfIn PDF document text
    • http://mediaverifiedbadge.com/venn_diagram_maker_free_printablevcqjv.pdfIn PDF document text
    • http://visionnew.xyz/moviestarplanet_vip_mod_apkgdd9n.pdfIn PDF document text
    • http://qwertyujg.xyz/tinkle_september_2020rhmrs.pdfIn PDF document text
    • https://lojodisomu.weebly.com/uploads/1/3/4/0/134042672/lixuzebisurut_fusolaf_gimejatefedukov_dakisolaxakoj.pdfIn PDF document text
    • http://vomuniwawan.iblogger.org/antenatal_care_who_guidelines.pdfIn PDF document text
    • http://herss.space/centrifuge_useslu23t.pdfIn PDF document text
    • http://goodshopsales.xyz/bise_sukkur_board_date_sheet_20191tsfi.pdfIn PDF document text
    • https://dojenamolusojow.weebly.com/uploads/1/3/4/8/134868247/wovitusegugezimewew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bowuxok.epizy.com/buat_website_gratis_android.pdfIn PDF document text
    • http://bitetam.epizy.com/wixipaloditotevuzatuk.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_off0000fe28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE28 5252 bytes
SHA-256: 9595c870a1b3c1341fbc6cd7b5797599776a4b50e4eca7a6af58dc48c2454268
font_01_sfnt_off00011017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11017 10768 bytes
SHA-256: 4c6831bc9ee59238838deb68af9959933a444812f264e0e94cd379f0d0c7ad6d

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