Malicious PDF — malware analysis report

Static analysis result for SHA-256 19dc21c87264014b…

MALICIOUS

PDF

87.6 KB Created: 2021-03-21 08:33:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 049c71d657741edea2f1dee83a3d415a SHA-1: 7e978823ad0be100b37e4e508fe5dee16d242baa SHA-256: 19dc21c87264014bdb5382e226bb75373c6c075f1da87df716d1f0049f683b3e
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into visiting a phishing site. No scripts were extracted, but the PDF structure and embedded URI strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/123?utm_term=legitimate+interest+impact+assessment+template
    • http://dadevizevarek.scienceontheweb.net/rovatukijosamemup.pdf
    • http://ruvogodozipabiv.scienceontheweb.net/davakumutotabizudofigoka.pdf
    • https://static.s123-cdn-static.com/uploads/4425230/normal_6007ea9ee79d5.pdf
    • https://cdn-cms.f-static.net/uploads/4465257/normal_602e0687e1501.pdf
    • https://cdn-cms.f-static.net/uploads/4413564/normal_5fe68c4a30d92.pdf
    • http://pavedewono.iblogger.org/overlord_light_novel_volume_12.pdf
    • https://static.s123-cdn-static.com/uploads/4446158/normal_6004e09ebe623.pdf
    • http://favarivizuna.medianewsonline.com/85286131166.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xomepixo/ditiguxagomejobux.pdf
    • https://s3.amazonaws.com/xaliwalufoguni/rte_guide_christmas_tv_listings.pdf
    • https://uploads.strikinglycdn.com/files/bad3b9d6-a8fa-4788-8d2e-8baaa548c6da/67988068326.pdf
    • https://s3.amazonaws.com/winumigutam/18051507528.pdf
    • https://s3.amazonaws.com/donukadizolin/75676806599.pdf
    • https://s3.amazonaws.com/posufij/game_killer_apk_3._11.pdf
    • https://s3.amazonaws.com/jinabom/piagets_stages_of_moral_development.pdf
    • http://bikikifuxax.epizy.com/99908819107.pdf
    • https://s3.amazonaws.com/mojivikapeti/clubbers_guide_to_ibiza_summer_2000.pdf
    • https://uploads.strikinglycdn.com/files/d58b5877-fccc-4c7a-a33d-362bacbb2ad2/61653704346.pdf
    • https://s3.amazonaws.com/mexesazaxasa/damage_report_car.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106d4.bin
0fa036c9c4db46b8cc05eb34db5220a9dccc3f4622b6bdc6ef05483d043436d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x106D4 5196 bytes
font_01_sfnt_off00011868.bin
d9314101724204a6566c3581bb41f5872d9f56686f8aba60d90fafc2862c3ac8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11868 10324 bytes
font_02_sfnt_off00013bf1.bin
9c43c18aa358de8105755ede142c657c2a330b0e24b8f62e03bdb628bd5289a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF1 16088 bytes