Malicious PDF — malware analysis report

Static analysis result for SHA-256 49679dad46931805…

MALICIOUS

PDF

86.8 KB Created: 2021-03-18 03:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1829934fd1a27cc2fc1224f0fbbbb18b SHA-1: 40fda51c556eda291c25705f04655e5dc54b5a5a SHA-256: 49679dad46931805d3750ba61a89ded120f0f4dbb4b22f2f345212e166ffadd7
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=cloud+9+siargao+surf+report PDF link annotation
    • https://cdn.sqhk.co/kupuruvew/WJFgfhh/islamic_music_mp3_free_download_arabic.pdfIn PDF document text
    • http://nutusugeralinet.mypressonline.com/22780344668.pdfIn PDF document text
    • https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/fipixelape_tukopin.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/hgAhi7j/xunamej.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/E1iaho5/nujokifuxoxina.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/17188019808.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/xusoluxazavenudeta.pdfIn PDF document text
    • https://cdn.sqhk.co/bexuxoxabim/9yhd8ji/petiduno.pdfIn PDF document text
    • https://gamiwejejorar.weebly.com/uploads/1/3/4/4/134498461/xezuxazivemod-zuvafakewobiva-puvorimidaro-gubavisepeku.pdfIn PDF document text
    • https://nenikekawudiw.weebly.com/uploads/1/3/4/4/134468161/bebakosulu.pdfIn PDF document text
    • https://kofuwirobunugob.weebly.com/uploads/1/3/4/3/134318534/dorowij-fogitexomi-dowezodar-nejeba.pdfIn PDF document text
    • https://vanizubifimid.weebly.com/uploads/1/3/0/8/130874516/9438791.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/PFMgvjj/wekezewuwilanokugowukovit.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/xu4jdUw/fluid_flow_analysis_software_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/ibjd09n/spotify_artists_not_updating.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://xiramegakasivi.epizy.com/dmax_tv_guide_tenerife.pdfIn PDF document text
    • http://fusagubo.epizy.com/how_to_clean_a_whirlpool_quiet_partner_2_dishwasher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ea8cb1-d5e8-406a-b9f6-399598cf8243/dijipomisasidozuf.pdfIn PDF document text
    • http://zilaxeputeso.epizy.com/aeolian_soil_formation.pdfIn PDF document text
    • http://gokojap.epizy.com/15917391406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aab25ae-0fb0-49ae-acdc-89630cd53d62/lopix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/155c453d-ebe9-408f-9205-36abbd9b0cc6/2008_honda_accord_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860b54e3-c790-4a97-ae72-36c7d2d340b8/pigukope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f446235d-8633-409b-9a5a-72e3fbf17e00/who_created_mathia.pdfIn PDF document text
    • http://reditab.epizy.com/xoneradetuvov.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_off00010534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10534 5164 bytes
SHA-256: 8ee90953b988f5fe0d1b961e66f98f992ecff97146a3cdd699aeb4d4051b1ff3
font_01_sfnt_off000116dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DC 12596 bytes
SHA-256: e97ff385ef5a10323956ad5d0d5e97838eeade8a554245c8b35ee282cdf7320a
font_02_sfnt_off00013df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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