Malicious PDF — malware analysis report

Static analysis result for SHA-256 401b14b1d2d2838e…

MALICIOUS

PDF

90.3 KB Created: 2020-12-02 11:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bf6a67eac4422fb34ef2e703a5d6c223 SHA-1: 60fb38548499e4e953327c9b75550aebaa4ae042 SHA-256: 401b14b1d2d2838ee4be8796f9e0578da9d9149dfdd229f56aa4d5b37153951a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=term+foot-washing+baptist PDF link annotation
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/b3658f1b71.pdfIn PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/givuko-kotorameg-girimevi-jukujapotifubaw.pdfIn PDF document text
    • https://lezotaxodad.weebly.com/uploads/1/3/4/4/134432483/movipirodu_gapexamebum_jalejeg.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47bc21b-9526-4d77-bc01-55384ae25235/jagatevovumemukuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d698032-1780-4eb2-8f83-69819b75e135/69014518030.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe104f645712565401bea9/1606291535771/eso_damage_magicka_poison_ix_vulnerability_ravage_magicka_ravage_stamina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da911242-856a-4e7a-9c2f-8ae4ec30702f/71523984230.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2ed17e7202640ea1bf0/t/5fc0fc19cb3e0f5771727e84/1606482970115/ethos_pathos_logos_worksheet_answers_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0070353e-f3e5-4683-8f1a-4dd8fa1603d6/thank_you_mr_falker_comprehension_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44fe6d10-7f64-4123-b696-7e8ae11caf3e/fepuguwupajawelofukovere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbe26aa9-3300-434e-9555-6b90a3cf388a/kebiliji.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54e01affbf90a6607a482/t/5fc744300623334b0c5d2d94/1606894640826/line_dance_2019_country.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2881293d-bd88-436a-bfe5-bacdc5e2b1b3/lixazuvoxoxona.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000106c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x106C1 15752 bytes
SHA-256: 0761095ed6cade6aac9940838257934becd29ff2885d642f26f88831c3280c65
font_00_sfnt_off0000f42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42A 5496 bytes
SHA-256: 66796333b8a2fdc421d44ab65c95d8c015b75f2bcf19326327d9c594f9865b74
font_02_sfnt_off00013293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13293 11816 bytes
SHA-256: 2c92c25dbeadd9e44b695f895fd437c31981ce29e897e4e4d1a587ecb93e2128

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