Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd806bd02abab875…

MALICIOUS

PDF

155.6 KB Created: 2021-05-12 04:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 13e507344c29ff91f85f471461b5749a SHA-1: da5e4435338d0cb65cba24e795bf354ee9209f78 SHA-256: dd806bd02abab875fdbd0b7fb2e0c8fc60c1342dac50fdc6a35cf89a0724ccae
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is described as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'American beauty original screenplay' and 'wkhtmltopdf', which appears to be a lure to disguise the malicious links.

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://midufefew.ru/strik?utm_term=american+beauty+original+screenplay PDF link annotation
    • http://migasoloraluxuj.scienceontheweb.net/34486292626.pdfIn PDF document text
    • http://wuwudikosegukem.mypressonline.com/jawexetilukegedofuxomezir.pdfIn PDF document text
    • http://wodedutipif.medianewsonline.com/fijafobavofub.pdfIn PDF document text
    • http://ritixibetono.mygamesonline.org/cisco_switch_3750_configuration_guide.pdfIn PDF document text
    • http://penafur.scienceontheweb.net/nokolabosodisim.pdfIn PDF document text
    • https://waporutonopira.weebly.com/uploads/1/3/1/4/131438234/xaguridodi-rezapa-vubeximipu-mumijofeviru.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/81458474308.pdfIn PDF document text
    • https://cdn.sqhk.co/waxoxewanuvi/ngfZjjP/stormfall_saga_of_survival_guide.pdfIn PDF document text
    • http://dabosesavedevet.medianewsonline.com/download_ardas_sahib.pdfIn PDF document text
    • https://tubababekegoso.weebly.com/uploads/1/3/4/8/134880125/148406.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/Yyicihg/autonics_panel_meter.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/jjasgdp/dazogemifijogi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bepafazo.epizy.com/anemia_de_celulas_falciformes_en_embarazo.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/14598844774.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/round_corner_business_card_mockup_free.pdfIn PDF document text
    • http://tovedevekep.rf.gd/prepositional_phrases_as_adjectives_and_adverbs_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/whatsapp_status_video_tik_tok_song.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22752 5484 bytes
SHA-256: 2fc6610d767906af66d4b5d8d16cbbf7a54adcdf2f1a89df88eca6673e4246f6
font_01_sfnt_off000239e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x239E9 11712 bytes
SHA-256: 47bdce68780dd7cbd14bcf9e3dd76d86d395bccec8e5bb3975269ea2270fb7d6

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