Malicious PDF — malware analysis report

Static analysis result for SHA-256 a722a397660ba0e3…

MALICIOUS

PDF

78.2 KB Created: 2021-03-02 13:46:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 263f000e96f3afaae48b58056bfa864d SHA-1: ab7d8b3cf110c6e083dff532d3db4411cf5d858e SHA-256: a722a397660ba0e3a8b402a016ba7dd824df2a66f5ec3976eabcec6c05626a95
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to a suspicious domain that appears to be part of a link farm. ClamAV and ML classifiers identified this PDF as malicious, likely phishing-related. While no scripts were explicitly extracted, the presence of embedded URIs and the overall structure suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further malware delivery.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/123?utm_term=blue+yeti+usb+microphone+-+blackout+edition+review PDF link annotation
    • http://lomigakorak.getenjoyment.net/xedojibuwoluwebo.pdfIn PDF document text
    • http://rekijiwowak.scienceontheweb.net/how_to_train_your_dragon_homecoming_season_1_episode_2.pdfIn PDF document text
    • http://legendarycraft.ru/15097462004rt47y.pdfIn PDF document text
    • https://vurejubi.weebly.com/uploads/1/3/1/4/131454114/41dee89fac.pdfIn PDF document text
    • http://covidcapsule.world/editable_quarterly_award_certificate_template9ps65.pdfIn PDF document text
    • http://superheatbelt.xyz/11940037038vls77.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/harry_potter_y_la_orden_del_fenix_audiolibro_latino.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/64135670862.pdfIn PDF document text
    • http://fitokapss.xyz/eukaryotic_gene_expression_control_points_answerspv3ux.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/julexekubaj/a_state_of_trance_900.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/guess_the_bollywood_movie_name_by_image_with_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/amazon_pay_upi_apk.pdfIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/66053862474.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/86864265473.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/funeducation_free_iq_test_answers.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_off0000f044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF044 5852 bytes
SHA-256: ddbb488cd1257bad4420674feb76660f623bb48c27a7b746f09a470af692f198
font_01_sfnt_off0001041b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041B 11112 bytes
SHA-256: 856f8dcef16a521bbdd7efc974cf7d9c6c9577a4677d2780221ef535082b2a79

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