Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c565a19493910f…

MALICIOUS

PDF

73.9 KB Created: 2021-03-04 22:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 755c4257e132442d818074d66c002bc3 SHA-1: 16aa7e3f2885e6513399d46aaad16e73c2ca02a3 SHA-256: f9c565a19493910f4043d67066db308fa54b927a191f058d265f9f0cd338bc81
96 Risk Score

Malware Insights

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

The PDF document contains a lure related to the song 'Yankee Doodle' and embeds a URL pointing to a suspicious domain. ClamAV detection and ML classification strongly indicate maliciousness, likely for phishing purposes. No scripts were extracted, but the embedded URI is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/aws?utm_term=what+is+the+meaning+behind+the+song+yankee+doodle
    • https://cdn.sqhk.co/dojaxeje/jbghiaA/93081646227.pdf
    • https://cdn-cms.f-static.net/uploads/4375352/normal_6012fa272619e.pdf
    • https://cdn-cms.f-static.net/uploads/4391624/normal_5fdc04c4885ce.pdf
    • https://cdn-cms.f-static.net/uploads/4417214/normal_603c5b1cf258e.pdf
    • https://cdn.sqhk.co/xixujipum/6gjCeoI/senekexajimitumatevitora.pdf
    • https://cdn.sqhk.co/moxoxitij/3gi4xzk/bamofunilokowu.pdf
    • https://cdn.sqhk.co/nomevagume/vidicjg/transformers_animated_shattered_glass_fanfiction.pdf
    • https://cdn.sqhk.co/vofonowul/gdLjdIC/2nd_grade_math_placement_test.pdf
    • https://cdn.sqhk.co/tororukiwuri/g3Vvsjg/hyperspace_yeezy_real_vs_fake.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d6a1a78b-a9fc-483c-84f5-9bca029aa5d5/new_gospel_praise_and_worship_songs_2020.pdf
    • https://uploads.strikinglycdn.com/files/99be9447-79b0-4802-9baa-a4682cf6df03/how_to_community_organize.pdf
    • https://uploads.strikinglycdn.com/files/ef64c29a-af02-4842-b944-8aed571b0b84/93221043542.pdf
    • https://s3.amazonaws.com/jupoti/megodevufolodemunovege.pdf
    • https://uploads.strikinglycdn.com/files/9e20484f-3cb3-4c08-9da3-21c426aab1bd/best_small_business_phone_system_review.pdf
    • https://uploads.strikinglycdn.com/files/87a70b5a-fd10-4d2a-bdb0-fc9d85454e68/74457301700.pdf
    • https://s3.amazonaws.com/dobesogum/rugajogipufutojotakip.pdf
    • https://uploads.strikinglycdn.com/files/766d3529-0375-497a-a916-236028a437b6/are_chai_tea_latte_keto_friendly.pdf
    • https://uploads.strikinglycdn.com/files/47d3d373-17da-4b37-8f45-d8a67e4c9e37/towevubereremirorolesif.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d3.bin
6747ffaeae59297f603bc81e05b10be6f93e3da5f3614eb2e01160970345835d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D3 5464 bytes
font_01_sfnt_off0000f553.bin
c545fe721dc4627c14a60d71f5c2924759568f6417925510d90e2a292c71f8a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF553 10996 bytes