Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c6cd5f19ace628…

MALICIOUS

PDF

73.6 KB Created: 2021-02-17 08:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a18c63db62406faa375207d2eddc9705 SHA-1: 34b62daf9d87a9114a0311a710a3ceb646985d6a SHA-256: 44c6cd5f19ace628832b359c824d24c9dc4c388c0c013b40890615f509ea6470
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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://maypoin.ru/wb?keyword=does%20walmart%20still%20print%20photos PDF link annotation
    • https://napolapivu.weebly.com/uploads/1/3/5/3/135303388/jiterizofigol.pdfIn PDF document text
    • http://niwifara.22web.org/11937234616.pdfIn PDF document text
    • https://cdn.sqhk.co/lepagesali/CibjjyW/rogojezagofasopibevedu.pdfIn PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/2490087.pdfIn PDF document text
    • https://vodazifuja.weebly.com/uploads/1/3/4/2/134265633/026bb2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xifabopopotesa.epizy.com/65782395948.pdfIn PDF document text
    • http://kujarison.rf.gd/hacksaw_blade_for_sheet_metal.pdfIn PDF document text
    • http://xumidexasij.epizy.com/bunnings_fire_proof_sheeting.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/caa_thomas_cook_atol_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/67880741965.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/marathi_katha_kadambari_free.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/adelaide_s_lament_sheet_music.pdfIn PDF document text
    • http://dinixebun.epizy.com/louisiana_literacy_test_1964_answers.pdfIn PDF document text
    • http://bopufadepop.epizy.com/event_backdrop_design_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/dokalawijogu.pdfIn PDF document text
    • http://nisogifamesada.epizy.com/android_box_play_games.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/zinefiworokax.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/css_form_template_example.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/pugesaberubusapaguke.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_off0000e2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F5 5152 bytes
SHA-256: b8a8e96a87dd3b76ba4df1ef89d912f83430c96108cb8060480cbf0220580b97
font_01_sfnt_off0000f460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF460 10712 bytes
SHA-256: 0ab0ffe0d56532dcabf719979010afb1fb5295d496f3273a453b384a65c7bf1b

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