Malicious PDF — malware analysis report

Static analysis result for SHA-256 984aaefddbc3c7b7…

MALICIOUS

PDF

46.9 KB Created: 2020-11-09 04:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1c4af92b0e616596488388cd7f6ddb41 SHA-1: 7e8de98f912b6ef1b67dc80d520dd1027ea1b95b SHA-256: 984aaefddbc3c7b73b831d59b80ced5c2a934d620cd77a07dbf614457c6ab1e8
174 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of numerous external links suggests a potential for distributing further malicious content or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffi.ru/123?keyword=maxwell+library+address PDF link annotation
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/454ede61a.pdfIn PDF document text
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/f505e53.pdfIn PDF document text
    • https://mawanegofarate.weebly.com/uploads/1/3/4/4/134466522/guwilobejopuv.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/vezesedovakano-genamuresojiroj-vusalifazesodu.pdfIn PDF document text
    • https://pejilajapife.weebly.com/uploads/1/3/4/4/134477767/682489278.pdfIn PDF document text
    • https://soleduni.weebly.com/uploads/1/3/4/5/134581057/rulotef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vofalop.files.wordpress.com/2020/11/electronic_devices_and_circuits_by_allen_mottershead.pdfIn PDF document text
    • https://popikelurelu.files.wordpress.com/2020/11/how_to_unlock_mythic_dungeons.pdfIn PDF document text
    • https://guluzalu.files.wordpress.com/2020/11/20122722041.pdfIn PDF document text
    • https://ditigogonib.files.wordpress.com/2020/11/dufopevik.pdfIn PDF document text
    • https://tulesizapej.files.wordpress.com/2020/11/82683011655.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/71296992425.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/apk_download_minecraft_apk_pure_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 5224 bytes
SHA-256: f323cec20579f019deca15c8ed9a752b8d517ef98c9e39af40fd05c8c9a77a65
font_01_sfnt_off000073aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73AA 11120 bytes
SHA-256: 4b4005515746b25988c3fdfcce2bbe5316f92ff14429cb11f15e9b9fe6078a1e
font_02_sfnt_off000099a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99A2 16144 bytes
SHA-256: 764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf

Open this report in the interactive analyzer, or submit your own file for analysis.