Malicious PDF — malware analysis report

Static analysis result for SHA-256 3914bccd2360bf68…

MALICIOUS

PDF

84.4 KB Created: 2021-03-05 05:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: f017e7af742f81b1e897f50532a6c7b4 SHA-1: 25440033c737b0663fa78295c4737c94bc7aa114 SHA-256: 3914bccd2360bf686ff3fc7303ed248dca1a6e7bd027686e577d136c3deda047
176 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or tech-support scam. The heuristic 'SE_CALLBACK_LURE' indicates the document is designed to prompt the user to make a phone call, likely to initiate a fraudulent transaction or gain remote access. While no scripts were explicitly extracted, the presence of numerous external links, including a link farm, suggests the document may serve as a lure to download further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://maypoin.ru/wix?keyword=que+es+practica+social+del+lenguaje PDF link annotation
    • https://mozufidapu.weebly.com/uploads/1/3/4/0/134012608/xirazewizari_vabezagupetel.pdfIn PDF document text
    • http://ropisunofo.mygamesonline.org/vanevob.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/ghjWjgm/camera_for_laptop_online.pdfIn PDF document text
    • https://bomoturu.weebly.com/uploads/1/3/1/3/131384468/tisumazefuv-movejo-depuzikabigoxob-jodusuvuli.pdfIn PDF document text
    • https://dutaveporope.weebly.com/uploads/1/3/4/6/134600224/7660182.pdfIn PDF document text
    • https://cdn.sqhk.co/xozirijor/boJjfFp/dojebigewikipejevejuvabo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2a082fd4-e93f-4b8e-9e59-408fa046b31c.filesusr.com/ugd/e334dd_b1b97e1984934da3bb8c5fa6936de3da.pdf?index=trueIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_1799b094dbc0406f87379d72a394c471.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/how_to_calculate_interest_payment_on_a_loan_in_excel.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/how_to_wear_earphones_with_buds.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/4713400607.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/archbishop_tenison_s_school_croydon_uniform.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_b5a54ef7ad1f4e0a930c45cfec151ab2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/sizetulepigoda.pdfIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_28f48d044dd845669e9ba92754810be8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajujiju/letras_chinas_abecedario.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF636 5376 bytes
SHA-256: 3ebe2d0086cbf432fbb32f2758a3ff212be0a0394e2cf75a7e4c83bdb72914e4
font_01_sfnt_off0001088e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088E 11676 bytes
SHA-256: 8ff34fda714f4ec474ddcdf013558313427f3a6ab20928cdb8d82826607a9bc5
font_02_sfnt_off00012f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0B 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140

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