Malicious PDF — malware analysis report

Static analysis result for SHA-256 0570a1adf14195ad…

MALICIOUS

PDF

79.3 KB Created: 2021-03-31 09:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b955ac4ede96275290c068559ac0076 SHA-1: 20fdb2ee744e52aaeffa98e18199b55568dc0a2b SHA-256: 0570a1adf14195ad4f4026834807a372e8a0ea35cf11fae4fa913d9c9ac1ee1e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely intended to host a phishing page or download a second-stage payload. The document body, though heavily obfuscated, appears to mimic a search result for a technical problem, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/wix?keyword=discord+mobile+headset+mic+not+working
    • https://cdn.sqhk.co/meduxemij/SqLPhhb/ghost_rider_fortnite_glider.pdf
    • http://mifelosilezine.iblogger.org/20056329534.pdf
    • https://static.s123-cdn-static.com/uploads/4377717/normal_5ff0024c59a90.pdf
    • https://static.s123-cdn-static.com/uploads/4444098/normal_5fc64d71870f4.pdf
    • https://static.s123-cdn-static.com/uploads/4410217/normal_5fff4dca0983c.pdf
    • https://cdn.sqhk.co/fukaxaxod/ihaF2gd/koala_bear_costume_for_adults.pdf
    • https://cdn.sqhk.co/baluwofuk/iiPihLU/mewetodomazenodi.pdf
    • http://begdas.fun/sat_exam_meaning_in_tamily7mok.pdf
    • https://cdn.sqhk.co/nezuxada/ghw8QZy/42029885813.pdf
    • http://vuzopozakobepe.22web.org/kodatir.pdf
    • https://cdn-cms.f-static.net/uploads/4386618/normal_60164326bdd4a.pdf
    • https://cdn.sqhk.co/foxoxaze/dghosgg/kadusufugowop.pdf
    • https://static.s123-cdn-static.com/uploads/4472488/normal_5fffcb7a2409a.pdf
    • http://sudedelanefozuk.66ghz.com/rivomajek.pdf
    • http://dorightpress.com/42096523488lbs8g.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/06e9ccfe-600e-44d1-aeee-2e2e36c834e9/how_much_does_the_101_bus_cost_in_india.pdf
    • https://uploads.strikinglycdn.com/files/ff81ad19-1db4-4e95-ba87-b17570671dec/final_fantasy_vii_remake_strategy_guide_book.pdf
    • https://uploads.strikinglycdn.com/files/a0755dbc-0e32-4280-a6ec-ac183874f060/64915183253.pdf
    • https://uploads.strikinglycdn.com/files/615b0ea0-7f71-4caf-97ee-2762cc026b86/gusotodubikudopopi.pdf
    • https://uploads.strikinglycdn.com/files/8a2be734-2065-44ff-bbf9-7a1e1a16c159/mcgill_university_gpa_scale.pdf
    • https://uploads.strikinglycdn.com/files/899e07a9-b3f0-4706-a2b9-fa4832f0d43e/what_if_the_scale_factor_is_negative.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_off0000f398.bin
c0336688d5eeabc872b97260e5105c5af54b4a4e1e7c67aba1618d1564f44ede
pdf-font-stream PDF embedded font (sfnt) at offset 0xF398 5648 bytes
font_01_sfnt_off000106b5.bin
9ad2f2a7776bd9671e42a426ead8185e1e85965a8f64502c445c7109ae3886cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x106B5 12272 bytes