Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf16c5d1c569718…

MALICIOUS

PDF

74.4 KB Created: 2021-04-01 04:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1ba24ef2de19adffa470410add7ad6f4 SHA-1: 9d76df3f1f57185424953d5f491ff6c0410da616 SHA-256: adf16c5d1c569718d094db8ecb62aacd56a8c2821c2250da5c8202ccf859966d
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The embedded URLs and the document's structure indicate an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://kuzutuzo.ru/strik?utm_term=nordictrack+exp+1000+for+sale PDF link annotation
    • http://mevukavotidu.getenjoyment.net/kezaxafi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484103/normal_6040c33ae6707.pdfIn PDF document text
    • https://cdn.sqhk.co/kevekelobivo/e6LtjaY/16342083687.pdfIn PDF document text
    • https://cdn.sqhk.co/xorunase/eUMy070/kebizopuxanuzibabopabapi.pdfIn PDF document text
    • https://cdn.sqhk.co/sawusuzi/B1ohajb/vuvaziteworisatupazatu.pdfIn PDF document text
    • https://duvarifa.weebly.com/uploads/1/3/5/3/135347264/kepotirotelaxa.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/nikug_sejet_menizonukusakaj.pdfIn PDF document text
    • https://muwujexowosis.weebly.com/uploads/1/3/1/4/131437891/e0c5c1f3e73a.pdfIn PDF document text
    • https://vinenuji.weebly.com/uploads/1/3/1/4/131453259/f74410e3b8bcc4.pdfIn PDF document text
    • https://kojuvaneginumo.weebly.com/uploads/1/3/4/8/134890768/lefegozumovifa.pdfIn PDF document text
    • http://guzoseta.getenjoyment.net/zitebewinusibedufema.pdfIn PDF document text
    • https://dipalowijoje.weebly.com/uploads/1/3/0/9/130969855/808610.pdfIn PDF document text
    • https://cdn.sqhk.co/refowofiros/n3vhb5A/kipuxanexeverijaw.pdfIn PDF document text
    • https://dilopimejaz.weebly.com/uploads/1/3/4/4/134487403/biziwenowoxa-nimunimit.pdfIn PDF document text
    • http://takovevagagiv.scienceontheweb.net/tutorial_java_android_studio.pdfIn PDF document text
    • https://cdn.sqhk.co/rusukumuva/V4c1orx/pawexegekag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421641/normal_600e8466e0918.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
    • https://s3.amazonaws.com/vofadoloves/vobugizixonuzubazalif.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/evenflo_car_seat_base_safezone.pdfIn PDF document text
    • http://ximuxulizi.myartsonline.com/naxulotagabiwonirejesil.pdfIn PDF document text
    • http://jibimom.myartsonline.com/what_to_name_my_small_business.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/elder_scrolls_online_crafting_guide_ps4.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_off0000d64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64B 5124 bytes
SHA-256: 21068df1f8dccd177b7fb571c54d38ff4789966039ac8e538f67ebdaac6a9509
font_01_sfnt_off0000e7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DA 11088 bytes
SHA-256: 42585ce5b7ca69b5cd827872a2f42dd5fd53b6c322547ec2f7a723137a3862b4
font_02_sfnt_off00010dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f