Malicious PDF — malware analysis report

Static analysis result for SHA-256 676422ac418d215a…

MALICIOUS

PDF

73.9 KB Created: 2021-05-14 02:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8d064132d416e20a178b398436b235db SHA-1: 51ebf5c67754faa163377766b3eeb345980083bd SHA-256: 676422ac418d215ae8c418333ba983c9e0c4ac9b91cadce6f2e8af4a006a20de
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=winning+chess+tactics+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5fda42dc4adc6.pdfIn PDF document text
    • https://rowagikej.weebly.com/uploads/1/3/4/6/134678960/soweriv-juxive-sagovaxeki-berefagos.pdfIn PDF document text
    • http://mail-autoscout24.net/arijit_singh_song_ringtone_download_202066dam.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/RKgjvhd/kutanagedupo.pdfIn PDF document text
    • https://rigugoxa.weebly.com/uploads/1/3/0/7/130776225/4474883.pdfIn PDF document text
    • https://sufudavinor.weebly.com/uploads/1/3/1/3/131381021/tijuwiworide.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/gjpcJjg/tozogivubimafoduvoge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_603c4b47cd467.pdfIn PDF document text
    • https://cdn.sqhk.co/tesikotuk/iRyb8Cj/90724423948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470035/normal_60686bcc4289c.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/icWTFRa/country_music_awards_2020_commercial_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424349/normal_600a4178577c6.pdfIn PDF document text
    • https://rupimobo.weebly.com/uploads/1/3/4/8/134891389/6227328.pdfIn PDF document text
    • https://kiwotatuna.weebly.com/uploads/1/3/1/8/131856308/780a2c32cfa36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_603a747c34937.pdfIn PDF document text
    • http://pakawuwujawo.getenjoyment.net/bleak_house_italiano.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/fosagobomap/giwawoborekapigidu.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/strong_curves_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/druid_feats_5e_circle_of_the_shepherd.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/4119421037.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25D 5520 bytes
SHA-256: 74bee5c95b95cd4e217b35fef704fd55e53c8ed96caddb8ab6628850cc057b80
font_01_sfnt_off0000f549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF549 10736 bytes
SHA-256: 6e018890e9d291b82c4417752848873f95a7e2ddb8db6f4c2c157db099743615

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