Malicious PDF — malware analysis report

Static analysis result for SHA-256 870434eba3461645…

MALICIOUS

PDF

78.8 KB Created: 2021-03-31 04:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b51087a3a1780aa8c68a95d32ec3376b SHA-1: d6df2fa70287d9951fdd325ec365c992bbc1a50b SHA-256: 870434eba3461645b501238987a6c3833d1fc1c59bf8911b3b4ad283fd4d72c9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The primary URL appears to be a lure related to removing a motion sensor bulb, likely to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=how+to+remove+a+motion+sensor+bulb
    • https://cdn.sqhk.co/toviranevu/yhgiihc/beach_buggy_racing_cars.pdf
    • https://cdn.sqhk.co/rarirawibowo/iuGznhh/snake_plant_soil.pdf
    • https://cdn.sqhk.co/sisadenev/jak0gc6/stack_rings_yellow_gold.pdf
    • https://benukozememig.weebly.com/uploads/1/3/4/4/134480731/ba88935151f.pdf
    • https://doxuvufunufake.weebly.com/uploads/1/3/0/8/130874670/taxusugogej.pdf
    • http://nowukusox.mypressonline.com/6848651325.pdf
    • https://cdn.sqhk.co/xogudililavo/kWMwiiG/kefokagenozufenefevofirip.pdf
    • http://zexorusawuwurew.sportsontheweb.net/3502693251.pdf
    • http://xamojopilupivo.scienceontheweb.net/anatolian_beyliks.pdf
    • http://tulomodev.getenjoyment.net/resadimiziki.pdf
    • https://cdn.sqhk.co/dawafawux/ig30hfr/62492853467.pdf
    • https://vatilevemuwaji.weebly.com/uploads/1/3/1/4/131453872/razevefewe.pdf
    • https://tetufimaburovi.weebly.com/uploads/1/3/4/0/134098130/f5eb62e4854419b.pdf
    • http://nukapag.getenjoyment.net/88321950068.pdf
    • https://cdn.sqhk.co/xedomobedusi/jaTMgcl/fadasasofawux.pdf
    • https://cdn.sqhk.co/zanotunuzi/i624hhH/nopumowanawumo.pdf
    • https://dojibabebane.weebly.com/uploads/1/3/2/6/132682208/7125282.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://tijuvewoduga.onlinewebshop.net/71894722572.pdf
    • http://xomapagovujux.atwebpages.com/borisav_stankovic_kostana.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9cd.bin
14b570bee82e49411f211d9577eb5b961f3f64039471245cd080dc2be1dac958		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CD 4964 bytes
font_01_sfnt_off0000fa9e.bin
20473e6a9f0f60f5849d4ce6fde716ee7bb9fe6fb717c7b72832daffc2a41150		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9E 10444 bytes
font_02_sfnt_off00011e71.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E71 4324 bytes

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