Malicious PDF — malware analysis report

Static analysis result for SHA-256 9704dc67a930d3ca…

MALICIOUS

PDF

75.9 KB Created: 2021-02-20 16:24:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c22b339a6ffca449a8feffc064df2043 SHA-1: 968edc9612a851945c538a44c8379ca3610dcb2f SHA-256: 9704dc67a930d3ca35f41dc95aeb6b3df72b4b818c1704758a5ddf31ef38d532
226 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution lure. It contains a large number of external links, many pointing to disposable hosting services, and employs a password-protected archive lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://maypoin.ru/aws?utm_term=can+you+factory+reset+an+iphone+11+without+a+computer PDF link annotation
    • https://nipufosuvomabuz.weebly.com/uploads/1/3/3/9/133999137/d4e7969bf2.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/5oE9wFu/zuwelopazukitinara.pdfIn PDF document text
    • https://turarizamagux.weebly.com/uploads/1/3/1/4/131453837/sanafubu-jepegurisanavek-ginagalukanofaj-xitesuzufef.pdfIn PDF document text
    • http://artelamp.store/xonazovi20fvm.pdfIn PDF document text
    • http://byt-upak.ru/bus_rush_game_free_download_apk8il0m.pdfIn PDF document text
    • https://joletumutete.weebly.com/uploads/1/3/4/8/134871701/konadolorur.pdfIn PDF document text
    • https://sojenumodab.weebly.com/uploads/1/3/5/2/135296615/xeniwozuf-sesajalud-mavufozu.pdfIn PDF document text
    • http://lajulufubugo.22web.org/xozakodutujutokagava.pdfIn PDF document text
    • https://dulumomotuvubu.weebly.com/uploads/1/3/4/7/134759228/lanur-lifajevika-vozigefife.pdfIn PDF document text
    • http://get3creditscores.info/49879567566tnean.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://fupizud.rf.gd/open_office_spreadsheet_file_extension.pdfIn PDF document text
    • http://budevoniv.rf.gd/mikrotik_750gl_datasheet.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_off0000dd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD90 5376 bytes
SHA-256: ab40a1cbbb4088f729106cd53ba2c1dd8e3d47531f741071ee55fa2eeee141d1
font_01_sfnt_off0000efd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD5 10640 bytes
SHA-256: e68ad1cb55ed7f7fda72b2f80903fd2e3d26ca5b034faa8ca1d69ec6169c4d2d
font_02_sfnt_off00011414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11414 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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