Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2442275de1573d3…

MALICIOUS

PDF

72.8 KB Created: 2021-02-21 21:02:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 01d8623d3c7751e35533cec5449ad41b SHA-1: 08de1d02e688c61384ad7387143d423081d39cd9 SHA-256: d2442275de1573d3cd970442c782789e0bff208f9eab223195dabf65cd0080db
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 numerous embedded URLs, with one prominent URL leading to `jottigo.ru` and containing a query parameter that mimics a search term. This suggests a phishing or redirection attempt, likely to deliver a secondary payload or lead the user to a fraudulent site. No scripts were extracted, but the PDF structure and embedded URIs indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/123?utm_term=what+did+cain+do+in+the+bible PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5fe7a1d80ff7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481157/normal_5fec10902753c.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/gjjZibs/49686399247.pdfIn PDF document text
    • http://zuvinesewuwiz.iblogger.org/nuzifudoxavonuxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_602255542a567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490725/normal_5fdc24c34cd0b.pdfIn PDF document text
    • https://cdn.sqhk.co/kupawusel/8AeIEwY/kapunubiwagapuluxidifed.pdfIn PDF document text
    • https://cdn.sqhk.co/tabuguran/jd1Ehcw/multiple_accounts_on_same_switch_animal_crossing.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/eSBgdli/clash_of_three_kingdoms_bot_for_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/hdpYijZ/top_scorer_2020_ipl.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://badivisixeg.epizy.com/beamer_template_in_latex.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/mazubipisakugenad.pdfIn PDF document text
    • http://rukinemofe.rf.gd/voot_app_colors_tv_naagin_3.pdfIn PDF document text
    • http://zinofamokolete.rf.gd/john_conway_game_of_life_download.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/l_t_infotech_annual_report_2017.pdfIn PDF document text
    • http://bogibil.rf.gd/14146092685.pdfIn PDF document text
    • http://welidigukiru.epizy.com/allegiant_tamil_dubbed_movie_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/wawutopozafedaw.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_off0000d2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BD 4696 bytes
SHA-256: 33253b0234afc4345f9ea940736c206b36ae8168ee37944a2c0af77b654d40bd
font_01_sfnt_off0000e2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AA 10948 bytes
SHA-256: a9cc1873758e4eb8e6d4b2a22b3aaae3b3e729f5ff216eb44694a381db4018f7
font_02_sfnt_off0001080c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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