Malicious PDF — malware analysis report

Static analysis result for SHA-256 001dc2d130ac1aa3…

MALICIOUS

PDF

106.5 KB Created: 2021-03-22 01:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ccdbafb2462429451deb571ae35857fb SHA-1: 53133d63157a9d51281e6b6c28f3ed3d36772b53 SHA-256: 001dc2d130ac1aa368772b5730423c8dd37de260cc1210783ccc964cf72a16f3
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous external URIs, many pointing to disposable hosting, suggesting it functions as a link farm. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/strik?utm_term=what+does+a+pagan+religion+mean PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451755/normal_600520ff62a10.pdfIn PDF document text
    • http://nat-fru.space/best_arcade_racer_pcv5b5f.pdfIn PDF document text
    • http://islandlandscapesbb.com/16728862769e6xmk.pdfIn PDF document text
    • http://genusadnlo.space/260_rem_140_berger_load_data8f36h.pdfIn PDF document text
    • http://stnold.com/20303428603tbsf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486036/normal_5fcce42f3587b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473654/normal_5fd12b3755666.pdfIn PDF document text
    • http://pomulagija.iblogger.org/whirlpool_refrigerator_service_center_contact_number.pdfIn PDF document text
    • http://honbiz.pro/1638500262068g2e.pdfIn PDF document text
    • http://esagafow.fun/fuvuginoxul1w5k.pdfIn PDF document text
    • http://216tilford.com/redopenovorosp8ir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406497/normal_601296e46b780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_6036c61ec5d90.pdfIn PDF document text
    • http://7lessons.site/bifimuje8rv0n.pdfIn PDF document text
    • http://lovemecompletely.com/vocabulary_builder_the_israelites_answer_key2f6is.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/nilafafakem/top_rated_breathable_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/edit_master_slide_template_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/43676906916.pdfIn PDF document text
    • http://xivobotaxonid.epizy.com/zifejupafulen.pdfIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_ad9af05623834e9dbf30e3d71a4dc957.pdf?index=trueIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_d2044224d9f0483b9828796637f2359c.pdf?index=trueIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_05c58750028b4749b66b2daec419faa8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/83340728707.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000183bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x183BC 17008 bytes
SHA-256: dc9d784b997cfb5ae51660580b4b2a763a3ea23014b6403a37f6ba3327fd5314
font_00_sfnt_off0001416d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1416D 5384 bytes
SHA-256: a035e08c51481f98e1fa3af1ba58fc13f2d47e4b52c02b1c028635400ecd5edc
font_01_sfnt_off000153a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153A2 15196 bytes
SHA-256: 2ed99422c5e426a946a24590bb8bcbbee5c679037fa57fc1dff064346b4ccd8e