Malicious PDF — malware analysis report

Static analysis result for SHA-256 109b18344fac4a5b…

MALICIOUS

PDF

74.7 KB Created: 2021-02-21 11:15:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8e37d7f7b51441094a710866cd91877d SHA-1: 8ea3f587f8ba2308149602538d297ccd7bc5dee5 SHA-256: 109b18344fac4a5b57f0ad68944b95dc8751966a25b4f087cbae0df98363326e
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of a large number of external links, including a link farm, suggests an attempt to direct users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and external links point towards a phishing or malware distribution scheme.

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://crophysi.ru/strik?utm_term=pre+marital+counselling+questions+and+answers PDF link annotation
    • https://bipewajebij.weebly.com/uploads/1/3/2/7/132740639/92b7bde6375fb8.pdfIn PDF document text
    • http://ighelpcenter.xyz/skyrim_dragon_language_copy_and_pasteip43n.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/NzTujg8/lebixami.pdfIn PDF document text
    • http://grinallex.shop/rexetuvzvz5e.pdfIn PDF document text
    • http://evakuator-uga.ru/nibojunukivepixonirkr8ej.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/2IihAjg/minecraft_java_edition_world_seeds.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/8045194.pdfIn PDF document text
    • https://cdn.sqhk.co/lepagesali/DOieieA/mazukise.pdfIn PDF document text
    • https://cdn.sqhk.co/wevavagu/ODjb9hh/party_city_balloons_delivered.pdfIn PDF document text
    • http://golomashvanna.xyz/zupem8f3i1.pdfIn PDF document text
    • https://cdn.sqhk.co/mivufarowiwi/jbjevji/64385991985.pdfIn PDF document text
    • https://cdn.sqhk.co/midipijikami/KcBrqhd/red_warty_thing_gourd.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/tawovojo/browning_a500r_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/31736691590.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/fimirasugamamo.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/swot_analysis_meaning_and_sample_format.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/garuda_extreme_tank_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/field_work_report_at_tra.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/aditya_hrudayam_kannada_free.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_off0000e6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BE 5480 bytes
SHA-256: ea50c94b2e0ccd9976bf9e8a218fd2a6b04adcf2c392de37950cb9a46808a149
font_01_sfnt_off0000f94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94D 10692 bytes
SHA-256: 0144351671805684acc94af53f7846be28effd173db10b0d7483bcfff11be698

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