Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ff7972372d2c0d…

MALICIOUS

PDF

80.2 KB Created: 2021-03-29 11:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 42c324076fd9e97db07c6f5bf63187aa SHA-1: 550b7a960c91ee5c33a7e4715570ec6371e9022d SHA-256: f4ff7972372d2c0d6e791aabddd89fad4c7727107f795389fdb89aabcbe57de4
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. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://crophysi.ru/123?utm_term=assurant+life+of+canada+forms PDF link annotation
    • http://sibatotud.iblogger.org/tanelujezomuloxelexo.pdfIn PDF document text
    • http://vatamuvemazaril.sportsontheweb.net/brunnstrom_s_clinical_kinesiology_6th_edition_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tokofape/fjgx9gj/41634941863.pdfIn PDF document text
    • http://lalevuw.mypressonline.com/ccsk_v4_exam_questions.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/37250301866.pdfIn PDF document text
    • http://mizarujil.mypressonline.com/cryptocurrency_investing_for_dummies.pdfIn PDF document text
    • http://bukipumil.mypressonline.com/tratamiento_de_rinitis_alergica_en_pediatria.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/9njfO89/scrabble_word_finder_with_16_letters.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422643/normal_5ffbef18ac343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_60463b9cbccd9.pdfIn PDF document text
    • http://sadegobawuzufos.22web.org/affairs_cloud_pocket_may_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426945/normal_601b8b6db2538.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://popeganezawojeg.rf.gd/71580673722.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a27711f7-81c6-4290-ba2b-a2904d790d4a/73063116092.pdfIn PDF document text
    • http://dojeranorered.epizy.com/84852784205.pdfIn PDF document text
    • http://vujulazi.epizy.com/anarchy_online_client.pdfIn PDF document text
    • http://niwuzowebod.epizy.com/website_menu_design_templates_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4333c69-d4a8-4421-a2ea-46dbb4dcf17b/wowonu.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_off0000fcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAD 5156 bytes
SHA-256: a0999fad4bd5e8dc3bcb57c7387b1e4cdf5263221f9087b8b086789bdac03643
font_01_sfnt_off00010e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E23 11056 bytes
SHA-256: a4e35ab6e12e7b989d0d6c4d98947ff1ab1f26f1932857b2f6d6ea26e9ff7d86

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