Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb7b99763868791…

MALICIOUS

PDF

80.2 KB Created: 2021-04-14 05:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8b6cf296bdd6d72bc717e123f4e172ad SHA-1: 26f28f3454cfe1bdd8bde1fad510c078832cead6 SHA-256: feb7b9976386879138daa494324991cc9b6f4e7cec5f72fa7d2ac61e14aa7aaa
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous external URLs pointing to various domains, many of which are hosted on disposable or suspicious platforms. The primary URL, 'https://jumiwimov.ru/strik?utm_term=hamilton+beach+coffee+maker+46290+replacement+carafe', suggests a lure related to product replacement parts, likely intended to deceive users into clicking through. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=hamilton+beach+coffee+maker+46290+replacement+carafe PDF link annotation
    • https://cdn.sqhk.co/zizenozi/jbijSCP/jimenedisogoj.pdfIn PDF document text
    • https://wumupokurura.weebly.com/uploads/1/3/0/7/130776197/283e28fec07a6e.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/55789991288.pdfIn PDF document text
    • https://cdn.sqhk.co/gotuxixovumu/cicijlv/anti-_theft_alarm_system_bmw.pdfIn PDF document text
    • https://kexazupaxi.weebly.com/uploads/1/3/3/9/133997339/8672228.pdfIn PDF document text
    • https://naferukogewoza.weebly.com/uploads/1/3/1/4/131406713/pobemunugikubomerem.pdfIn PDF document text
    • https://sujujawajiz.weebly.com/uploads/1/3/5/9/135964945/669860.pdfIn PDF document text
    • http://xilatotes.sportsontheweb.net/an_introduction_to_genetic_engineering_download.pdfIn PDF document text
    • https://cdn.sqhk.co/guxuboru/K3ghf9I/cyber_security_news.pdfIn PDF document text
    • https://figusemaf.weebly.com/uploads/1/3/2/6/132682639/e9fed5097.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/7uuHAGK/dungeon_chronicle_mod_apk_2._43.pdfIn PDF document text
    • http://wuramegojuluz.mywebcommunity.org/bacterias_coliformes.pdfIn PDF document text
    • https://pepumekonerobo.weebly.com/uploads/1/3/5/3/135350377/7288991.pdfIn PDF document text
    • https://limisakaxenit.weebly.com/uploads/1/3/4/3/134371081/4637188.pdfIn PDF document text
    • https://zusavakaki.weebly.com/uploads/1/3/0/8/130815140/452e7d438e3aab1.pdfIn PDF document text
    • https://pijaxulejogelub.weebly.com/uploads/1/3/0/8/130874219/3051374.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pofijiserige.onlinewebshop.net/types_of_cesarean_section.pdfIn PDF document text
    • http://doxokalisawe.myartsonline.com/39176577300.pdfIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_4c0fa152e6d0404f94609975b2348a43.pdf?index=trueIn PDF document text
    • http://rolubumemetujin.atwebpages.com/staff_performance_appraisal_form.pdfIn PDF document text
    • http://zegetafirotazaz.atwebpages.com/creating_shared_value_porter_summary.pdfIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_64bae4f60617407ab281986b24a248bd.pdf?index=trueIn 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_off0000fb3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3E 5912 bytes
SHA-256: 3c035e4bb7bd273b1006e1542384d6519b9a30eaf866cd42654acdd3407388b6
font_01_sfnt_off00010f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F38 10652 bytes
SHA-256: fb1d2c27e204a2fa1ded368d47fb5f0215813286bce72602c8288e0a0847c1a6