Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19db245cec6bc55…

MALICIOUS

PDF

75.8 KB Created: 2020-11-21 11:10:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d2c8b2cc6105afe48ab540630f89af77 SHA-1: 5b1c4d0c97ca56a464d624cb0ea2b5bd2c6c1a37 SHA-256: a19db245cec6bc5586a618ecd0bc6ee7514ee7c44174574cba3c2cc615552777
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm heuristic. One of these links, 'https://trafftec.ru/aws?utm_term=attitude+video+status++in+english', is suspicious and likely leads to malicious content or phishing. The ClamAV detection and ML classifier also indicate maliciousness, suggesting this PDF is designed to redirect users to harmful sites.

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 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://trafftec.ru/aws?utm_term=attitude+video+status++in+english PDF link annotation
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/6438900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f872ac946d92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_5f9c6dec76ee9.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/rotowan/honeywell_ademco_vista_20p_programming_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/make_text_bold_in_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/error_0x80070141_windows_10_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/classified_all_pack_a_punch_part_locations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd2c49d-35ab-4ea3-addf-2b5d9b6b7e56/viwovakuvixuboxo.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/bmrcl_key_answers_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/51622876189.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/hardeman_county_warrants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df7c7b09-df50-434c-90b7-4498ac955d21/41850702183.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/10542126007.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_off0000ee53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE53 5040 bytes
SHA-256: b2dd822c38ecd9b1cef734bc59124a65ff2ebd58acab8163d953dcc7ac418cc3
font_01_sfnt_off0000ff7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7B 10220 bytes
SHA-256: 7bbb5afab2a1f447e60b623591ba3344f7b55b0b770c77005991f9e8ae07f551

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