Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aafaf8dda8180a3…

MALICIOUS

PDF

85.8 KB Created: 2021-04-14 04:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 10d62539a2f2ebd1b6e0528578cf37ed SHA-1: e5b7e20b46b68bd06762fdbb34eefe7c886da365 SHA-256: 4aafaf8dda8180a382920e1a3638abdd4d1957bad8a1c2dc67973ec7a562f31d
134 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The presence of a 'download button' lure further supports this. Although no scripts were directly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious content, likely a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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://maypoin.ru/strik?utm_term=%25D9%2583%25D8%25AA%25D8%25A7%25D8%25A8+reinventing+your+life+%25D9%2585%25D8%25AA%25D8%25B1%25D8%25AC%25D9%2585+pdf PDF link annotation
    • http://gamukanemafutu.mywebcommunity.org/38148493586.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466662/normal_5ff713201c43e.pdfIn PDF document text
    • https://cdn.sqhk.co/demejapad/djdggiE/teacup_pigs_for_sale_cincinnati_ohio.pdfIn PDF document text
    • http://summ-ita.space/zegubifuwilawepawujil4xguu.pdfIn PDF document text
    • http://cuzinfo.ru/97091952719o0480.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/nYgifhh/nokunixamativotabazoju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474739/normal_5ff1432b0f57d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476767/normal_5ff92b8860ce5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472481/normal_6047755e49f45.pdfIn PDF document text
    • http://axecheat5.xyz/westinghouse_40_inch_tv_problems566w0.pdfIn PDF document text
    • http://metalllift.ru/besharam_full_movie_2013u8lup.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/7579862377.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/gudujebexabebel.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
    • https://s3.amazonaws.com/bopuxosavubare/64617351542.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/82301028542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa596a1b-c23f-45aa-bf10-d7b34b0adfb6/43537338615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/343f173e-3de8-46fa-a5ac-091f0b6f976d/is_omron_m3_accurate.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/d-link_dir-615_hardware_version_t1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab4208a-eedb-41be-aafc-2cd8d4ed662b/how_long_are_navy_seals_active.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/hands-on_machine_learning_with_scikit-learn_and_tensorflow_2nd_edition.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE945 4772 bytes
SHA-256: d79a396ddc2c5c2c163305a2d8d2aa85284a82a9dfd8de2281deb0ebe59f90fa
font_01_sfnt_off0000f997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF997 11292 bytes
SHA-256: f47e2227439a81f45ff53bdb11b0b43197916633a29737825b1ada8a7e04517e
font_02_sfnt_off00012047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12047 17016 bytes
SHA-256: ea342956b425a7413bbf82985e3602668835aef34975220678d1c4e3ccbd2e7a
font_03_sfnt_off000138ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138AB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c