Malicious PDF — malware analysis report

Static analysis result for SHA-256 e140577f43f48c71…

MALICIOUS

PDF

73.3 KB Created: 2021-02-10 02:18:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 7121d852c7966e3121375d6adb705291 SHA-1: 0835f749473b464495f1a1914e96caadebd9faa2 SHA-256: e140577f43f48c71d42e96ea48eca092c5a0d45e4c45612211fb29f9da92c4ba
156 Risk Score

Malware Insights

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

The PDF file was flagged by a critical ClamAV detection as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_LINK_FARM firing suggests the document contains a mass of external links, likely to manipulate search engine results or redirect users to malicious sites. While no scripts were explicitly extracted, the presence of numerous external URIs, including one with an 'unknown' reputation, points towards a phishing or redirection attack.

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://seumenha.ru/aws?utm_term=weather+report+jagatsinghpur+odisha PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476123/normal_5fca3fe84fc52.pdfIn PDF document text
    • https://cdn.sqhk.co/niripakexad/Bgehhjh/bingo_calling_cards.pdfIn PDF document text
    • https://jeduwenerapowi.weebly.com/uploads/1/3/4/6/134678879/zugaxorelolobigowugo.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/ghigdii/hack_motogp_racing_17_championship.pdfIn PDF document text
    • https://cdn.sqhk.co/lajojeletab/gfgfLT6/bemagaridotizunodovurawe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nijosinizo/nccn_guidelines_molecular_testing_lung_cancer.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/76079895872.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/nafuketupetojip.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/materi_statistik.pdfIn PDF document text
    • http://mekufajotifix.rf.gd/medicinal_plants_information_neem.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/mop_ante_up_320.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/longitude_and_latitude_worksheets_free.pdfIn PDF document text
    • http://zajozikudesurek.epizy.com/avengers_endgame_desktop_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/binununaxuzevuvevopa.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/fundsmith_emerging_markets_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/93433805288.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54C 5160 bytes
SHA-256: b8160ec539a9d1cd8636b0090610cac52ba045be0436558e40f65fa7f2e31dbf
font_01_sfnt_off0000e6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E3 10112 bytes
SHA-256: 24e8bb5b1cc2fe738ea74b82b8772d8b299be5f52e15b8830e3f82139607562f
font_02_sfnt_off0001096c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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