Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b67149e32de001…

MALICIOUS

PDF

77.5 KB Created: 2021-04-02 04:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5c3cbd622cc1ac5457879ea9061ee08 SHA-1: 25faeebb120f4a3df46a9ed37164d359d8f862ea SHA-256: 07b67149e32de001d993c1a089f71a0e4591b70c91b75498857393982dc32de6
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to facilitate a phishing attack. The document body, though heavily obfuscated, contains text related to a fishing report, serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=helmsdale+fishing+report+2019
    • https://cdn-cms.f-static.net/uploads/4529087/normal_5fd5f4e01015b.pdf
    • https://cdn-cms.f-static.net/uploads/4480383/normal_6043795c6a9de.pdf
    • https://cdn-cms.f-static.net/uploads/4474211/normal_60297640971bb.pdf
    • https://cdn-cms.f-static.net/uploads/4466679/normal_5fd67aebbe522.pdf
    • https://cdn-cms.f-static.net/uploads/4417422/normal_5fda87f85cfa9.pdf
    • https://cdn-cms.f-static.net/uploads/4445737/normal_602af63d6e3f2.pdf
    • https://cdn-cms.f-static.net/uploads/4483359/normal_5fd2813bcf973.pdf
    • https://cdn-cms.f-static.net/uploads/4384295/normal_601ba7db2ffb3.pdf
    • https://cdn-cms.f-static.net/uploads/4449974/normal_602221cad7670.pdf
    • https://cdn-cms.f-static.net/uploads/4481509/normal_60172c1f3526a.pdf
    • https://static.s123-cdn-static.com/uploads/4366401/normal_5ff26d08b391d.pdf
    • https://cdn-cms.f-static.net/uploads/4453732/normal_60244cadceb86.pdf
    • https://cdn-cms.f-static.net/uploads/4450415/normal_5fd32d47aa628.pdf
    • https://cdn-cms.f-static.net/uploads/4465264/normal_604aad3eb5847.pdf
    • https://static.s123-cdn-static.com/uploads/4392444/normal_5fde4c99438a4.pdf
    • https://static.s123-cdn-static.com/uploads/4369655/normal_5ffa9601255a6.pdf
    • https://cdn-cms.f-static.net/uploads/4455399/normal_6010e2320a168.pdf
    • https://cdn-cms.f-static.net/uploads/4496616/normal_5fe99498149ba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kukupunopedon/anemia_falciforme_e_hemoglobina.pdf
    • https://s3.amazonaws.com/dutimajizowa/kuxobam.pdf
    • https://s3.amazonaws.com/xisefowu/drudge_report_rss_feed.pdf
    • https://s3.amazonaws.com/bejikefowu/wojamumabumilulokuledano.pdf
    • https://s3.amazonaws.com/posufij/hotstar_mod_apk_file.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_off0000efaa.bin
d25997f7347aa4e032e9ce9a2e86b593ff8076628e41df3606509ac56e4a234e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAA 5900 bytes
font_01_sfnt_off00010394.bin
de091b0f43a97229cfba8cb6a4badc39787137522667646be8405082ff8bf6cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x10394 10312 bytes