Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7f693cc7ddef3e…

MALICIOUS

PDF

76.7 KB Created: 2021-03-23 21:24:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 887d85e885e560e8fe069f3890039065 SHA-1: 806a555f16a80a1ab227b6a939e5c3d34a1e57e1 SHA-256: ec7f693cc7ddef3e638bc25219b981b006ae38f618b0d0887de3eee22f432e06
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with the primary malicious URL being 'https://lozipotod.ru/123?utm_term=android+adb+install_failed_version_downgrade'. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the link farm structure strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://lozipotod.ru/123?utm_term=android+adb+install_failed_version_downgrade PDF link annotation
    • http://itawegan.space/kawuwipolixemuzumede75l6o.pdfIn PDF document text
    • https://kawavaturitavo.weebly.com/uploads/1/3/5/3/135321378/wusovavasimev_dekaxudifawu_lesodafawopumi_xamedisuxili.pdfIn PDF document text
    • http://fly-drive.online/how_much_oil_does_a_ryobi_pressure_washer_takep4xcc.pdfIn PDF document text
    • https://cdn.sqhk.co/sofawaju/z6jhwid/black_nebraska_uniforms.pdfIn PDF document text
    • http://instacopyrightcenter.com/how_to_clean_print_head_on_epson_workforce_wf-26307l2za.pdfIn PDF document text
    • https://wamokanudetavud.weebly.com/uploads/1/3/4/5/134510572/9273082.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/tiwudotugog.pdfIn PDF document text
    • http://netewe5.xyz/561150368072n0u7.pdfIn PDF document text
    • https://bomaripuxizidul.weebly.com/uploads/1/3/4/9/134901287/9c784b5.pdfIn PDF document text
    • http://1xbets-reg.site/what_skilled_trades_are_in_high_demanda91og.pdfIn PDF document text
    • https://repositugi.weebly.com/uploads/1/3/0/7/130738607/gemem.pdfIn PDF document text
    • https://cdn.sqhk.co/jetirivotu/giifih1/cargo_2009_full_movie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_d4876e6307fa4557a1fbeec8f700fc1c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zesixefe/retrieve_archived_gmail_android.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_84fd966d066b4e7eb50c6b2cef974fdb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bivanud/73260839273.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/27714926821.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/mudidonanomajeleda.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/jenagulilatawir.pdfIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_f4aa14cecd1347b994f4cee234e34364.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/remeranexe/65315693115.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/83121915781.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/column_addition_worksheets_year_3.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_off0000eb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2D 5384 bytes
SHA-256: f36993321ef493df1a9c2113d508c42b132475e9ac209259ee8d53fdb26d9a95
font_01_sfnt_off0000fdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAC 11892 bytes
SHA-256: 44e23504c9cc80fba0a64b56e89194a75644ee1ae18f386ed6a718a0f820ebbc

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