Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38aa9e348906eee…

MALICIOUS

PDF

80.5 KB Created: 2021-03-25 13:40:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2a4bfbb2113054b20671db5377cff76 SHA-1: bdb5cc4a57b3427b1bc3fc4d5408d6513b58abbc SHA-256: e38aa9e348906eeed256435fe90711e9545315b0d86acf3839f93edc6331a8f7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. It contains an embedded URI pointing to 'https://bologen.ru/wix?keyword=mission+valley+high+school', which is a strong indicator of a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=mission+valley+high+school
    • http://osummer.space/warriors_dont_cry_full_book_summaryi8tc4.pdf
    • http://love-cosmetics.shop/88127133759hu23v.pdf
    • https://cdn-cms.f-static.net/uploads/4471688/normal_601e5a51bba08.pdf
    • https://cdn-cms.f-static.net/uploads/4408184/normal_602ec288ef64b.pdf
    • https://cdn-cms.f-static.net/uploads/4421201/normal_5fe78aa3228e8.pdf
    • http://erse.xyz/66945456843tw3ov.pdf
    • https://static.s123-cdn-static.com/uploads/4492259/normal_5ffaa64a7e03d.pdf
    • https://cdn-cms.f-static.net/uploads/4462730/normal_604d90610b35c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tabobujimo/daily_oral_language_review_3rd_grade.pdf
    • https://s3.amazonaws.com/tipikaxe/xoxami.pdf
    • https://uploads.strikinglycdn.com/files/a9b972e1-f2f9-4cd7-8894-d7b3c9cd1732/waguril.pdf
    • https://uploads.strikinglycdn.com/files/8ff76b04-6f0a-4287-906b-2d05839762c4/zivopizuwikadin.pdf
    • https://s3.amazonaws.com/tizowodifi/aia_dental_claim_form_hong_kong.pdf
    • https://uploads.strikinglycdn.com/files/5eb5d2ac-8868-4767-a954-dfd1f1af53db/36429637680.pdf
    • https://uploads.strikinglycdn.com/files/aad78f76-6b49-458c-9839-6f062d429fab/4976232922.pdf
    • https://uploads.strikinglycdn.com/files/783f1c3a-105b-452b-8e31-45603f8fc41d/kekixodigofiberagolekij.pdf
    • https://uploads.strikinglycdn.com/files/8cce678e-a121-442b-8a26-6c1280f2d70a/66493612867.pdf
    • https://uploads.strikinglycdn.com/files/0829d0d6-4cd2-4a5d-8d2e-30941741c438/85008436709.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_off0000ffa6.bin
ad792b4e8f0dfc3e02fe87a90310aad01d5f37abe6d692e4710e4e39d86daad9
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA6 5132 bytes
font_01_sfnt_off0001113a.bin
4905dbbc05eb84c83e985c179d8aa44cd59c07e1a58b2e2ed4c96bfe904eeabb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1113A 10504 bytes