Malicious PDF — malware analysis report

Static analysis result for SHA-256 04501935a1987045…

MALICIOUS

PDF

81.0 KB Created: 2021-03-01 19:25:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5595537789ad97aa35f0ea882dae7881 SHA-1: 27039908c4d786a7b1941a5a5dc682636c565fe5 SHA-256: 04501935a19870456e00ce30fb0d30f64f95182ea43ceecdb3697473264a4484
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 pointing to disposable hosting and link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to training and a PDF filename that could be used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/123?utm_term=motivational+interviewing+training+brisbane+2020 PDF link annotation
    • https://cdn.sqhk.co/lisupixiwe/gjf8jc6/swot_template_free_powerpoint.pdfIn PDF document text
    • https://nunosutelakib.weebly.com/uploads/1/3/1/3/131383720/voxawogedena.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/geCigfS/dudadasaxor.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/15042625615.pdfIn PDF document text
    • http://memisada.mygamesonline.org/fofumudokeku.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/kikonajinozin.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/vtcozha/football_training_camp_for_high_school.pdfIn PDF document text
    • http://zakomuxoza.getenjoyment.net/25382575390.pdfIn PDF document text
    • https://tebugusenaj.weebly.com/uploads/1/3/4/8/134870623/luwutake.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/iajLykK/finawakudoti.pdfIn PDF document text
    • https://tazuwadafif.weebly.com/uploads/1/3/4/8/134857375/gekikubaju.pdfIn PDF document text
    • https://wizenavadabavor.weebly.com/uploads/1/3/4/5/134518239/molibat.pdfIn PDF document text
    • https://wixepivod.weebly.com/uploads/1/3/0/7/130775856/jesaxejunatavuwak.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/the_lost_years_of_jesus_elizabeth_clare_prophet.pdfIn PDF document text
    • http://jexekiraj.sportsontheweb.net/desegamuxevunev.pdfIn PDF document text
    • https://lovarewido.weebly.com/uploads/1/3/4/3/134322716/502c889135836f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/avast_free_antivirus_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/jizoruvibikira.pdfIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/92022896758.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/how_to_make_a_crown_royal_chair.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/3343929839.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_off0000eec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC0 3588 bytes
SHA-256: 97b211dd74c1becc16c19fd8a362232bfdfd1f6573c36ba0b9885c1d55b36057
font_01_sfnt_off0000fb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB72 5424 bytes
SHA-256: 7f29cc254e8858df65ba9901b7a8fd57dab111997996921e3679336e098d93e7
font_02_sfnt_off00010e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E10 10944 bytes
SHA-256: f244a3209cc1001c92f796cbc70cfafd719b33f72a8a64d4b1146dac5b8b6f58

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