Malicious PDF — malware analysis report

Static analysis result for SHA-256 f75aa5a01531b77c…

MALICIOUS

PDF

79.8 KB Created: 2021-04-16 17:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd716b89cc266f4cd1450cbb93cc9648 SHA-1: df423da2098e2a8945b81a6ffe6bb4694fb64290 SHA-256: f75aa5a01531b77c720979314b7cd7da642ececc8754b5afaf171e309fa4382b
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 high risk score. It contains an embedded URI pointing to a suspicious domain, and numerous other URLs were extracted, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'worksheet' and 'wkhtmltopdf', indicating a lure to disguise malicious intent. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=text+features+5th+grade+worksheet
    • http://1ux.site/43278820257p80up.pdf
    • http://zobowodinoto.iblogger.org/pexawopoxizolexegejom.pdf
    • http://rivuxini.66ghz.com/how_to_counter_parental_alienation_damage.pdf
    • https://cdn.sqhk.co/lefuwaregew/otp4ijo/mor_sansaar_ma_download.pdf
    • http://beautysale.site/corporate_bond_market_in_india_pptlszc9.pdf
    • https://cdn.sqhk.co/xizubutagen/jhjcp3b/42184006650.pdf
    • https://cdn.sqhk.co/sadirorig/Asjf8jg/3389507143.pdf
    • http://itash.space/77253096348j8763.pdf
    • https://cdn.sqhk.co/pirujezexod/siaGijU/58767425724.pdf
    • http://realwockyc.info/what_does_strip_mean_in_pythonnrtzj.pdf
    • http://world-wildshop.com/729589768102h152.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/1ba65526-5aae-462d-9c4a-a5045fdf2753/93618544312.pdf
    • https://uploads.strikinglycdn.com/files/11dd5c3c-4489-4b29-80d7-fa6d09328ac0/sozatu.pdf
    • http://mubapumasas.epizy.com/return_of_the_king_extended_edition_disc_2_length.pdf
    • https://uploads.strikinglycdn.com/files/95ca7cc3-3027-4e97-8551-b435f835eff1/wevesu.pdf
    • https://uploads.strikinglycdn.com/files/ec498e26-6c50-47e8-bc73-edd74a64cd94/ridgid_miter_saw_parts_ms1065lz.pdf
    • https://uploads.strikinglycdn.com/files/65238bfd-5124-4aaf-a3db-60af5e026327/76722541097.pdf
    • https://uploads.strikinglycdn.com/files/54e86d2a-7779-4fde-8048-ba986b11ff57/what_do_the_yoga_sutras_meaning.pdf
    • https://uploads.strikinglycdn.com/files/6a544793-7c2b-4108-99b4-a0c2f19ee6b8/warriors_into_the_wild_movie_by_erin_hunter.pdf
    • https://uploads.strikinglycdn.com/files/d091ed25-543d-460e-9ef2-36e308596174/christian_devotional_books_for_married_couples.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee03.bin
3119220db72fd9570d21653ccbe36f98c23e5e87b99010ad59d1adcc39190cf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE03 5164 bytes
font_01_sfnt_off0000ffbe.bin
c0a426a41f4701e08df0cde6ae120f071267a93beaaf31e2a32f8b59145d9067		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBE 10500 bytes
font_02_sfnt_off000123d1.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123D1 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.