Malicious PDF — malware analysis report

Static analysis result for SHA-256 1905d36e4640313f…

MALICIOUS

PDF

72.9 KB Created: 2021-02-25 16:51:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5d116c01289f75abd1f3a69b22487155 SHA-1: ddbfd4b45a7d080a11248f5393a50ab7cb7934c2 SHA-256: 1905d36e4640313f0c7441cf9f5ebf3cb149c818809cccbcc3a5cd7390e13c92
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to search terms, suggesting a phishing or scam lure.

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 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://seumenha.ru/strik?utm_term=liftmaster+formula+i+program+remote PDF link annotation
    • http://rixorevu.getenjoyment.net/politojovedo.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/aieDtpp/58991257576.pdfIn PDF document text
    • http://storeplus.pro/minn_kota_owners_manuale555j.pdfIn PDF document text
    • http://maddot.space/happy_images_for_whatsapp_dpp0tlj.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/j6kihhd/45403282142.pdfIn PDF document text
    • http://netlysy.online/65471437466h0gmi.pdfIn PDF document text
    • http://top-shop-store.website/xadofobivanzcqk.pdfIn PDF document text
    • https://cdn.sqhk.co/razilipot/iYKzegd/identity_v_hunter_tier_list_season_11.pdfIn PDF document text
    • https://xanerenidijuv.weebly.com/uploads/1/3/0/7/130739333/werekizususo-pizabibi.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/48323937012.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/dinilederu/como_hacer_manualidades_de_navidad_para_vender.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/40510636694.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/kogolegamopelur.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/nikon_d400_price_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/zojujizezawamiwinano.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_off0000d57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57B 4940 bytes
SHA-256: 42ed2c444dc7b5acf65e19ab6dcab1c72f40c9ab715ccb01b6557ece14b9cc3b
font_01_sfnt_off0000e64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64D 10076 bytes
SHA-256: a277eb407e946a22af8dc620646d57a3af0fafd93860e0d9d4073735d817caa3
font_02_sfnt_off000108d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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