Malicious PDF — malware analysis report

Static analysis result for SHA-256 077cd2ad8458f518…

MALICIOUS

PDF

78.5 KB Created: 2021-02-24 19:29:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c9660dac20d3adb0a96b0d08198434fa SHA-1: ee0f476b77f8044366e732144491e2be14abee9a SHA-256: 077cd2ad8458f5188620178988dc4113764a82f0ad1593f45627be142dd611e9
126 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 URI pointing to 'baarspo.ru' and another URL associated with a link farm on disposable hosting, indicating a likely attempt to redirect users to a malicious site. The document body, though partially obfuscated, contains text related to fitness, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/123?utm_term=how+to+use+resistance+bands+for+pecs PDF link annotation
    • http://bufenukaje.22web.org/10425159460.pdfIn PDF document text
    • http://sidesevofexow.22web.org/new_amsterdam_season_3_episode_guide.pdfIn PDF document text
    • http://nagozubotejelaj.iblogger.org/which_statement_best_describes_non_probability_sampling.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/zunivirupigunakeji.pdfIn PDF document text
    • http://juvugewit.iblogger.org/converse_all_star_plataforma_plateadas.pdfIn PDF document text
    • http://the-job.ru/wuvogxqw42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460263/normal_6003527f40875.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zulexesovo.epizy.com/zepogif.pdfIn PDF document text
    • http://jexukavelewin.rf.gd/deadwood_movie_english_subtitles.pdfIn PDF document text
    • http://kodupir.epizy.com/91982838155.pdfIn PDF document text
    • http://nutidefuga.rf.gd/cable_crunch_form.pdfIn PDF document text
    • http://gadudadu.rf.gd/app_that_answers_math_questions_for_you.pdfIn PDF document text
    • http://dogefifuga.rf.gd/rengar_build_guide.pdfIn PDF document text
    • http://xuxejoser.rf.gd/font_awesome_button.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/vesugofujipuzodafumoburu.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/aasl_standards_framework.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CE 5192 bytes
SHA-256: fe611d5af0540c324ab750bbf7b6c6a526c46204bc0118945860f0e800b5fa53
font_01_sfnt_off0000f98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98F 10968 bytes
SHA-256: ff629cafed3485270e9ed1d210e8762f8a7fbbaedbc2704d276fe24b0e88e950
font_02_sfnt_off00011ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333