Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e50e7841b5f9e8f…

MALICIOUS

PDF

65.3 KB Created: 2021-02-23 00:54:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 88af1af6e7344331e5b0fcb1f9f78289 SHA-1: 5fc5df2ea08ca56fcadbcceee2e48294924f560a SHA-256: 7e50e7841b5f9e8f425abfb4faf6438c2e7bb983ab6638318740515a42385f40
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://yafferge.ru/wb?keyword=how%20to%20connect%20polk%20magnifi%20soundbar%20to%20tv In PDF document text
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/786941.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/wirav-kutazakidi-ralukerij-pezegex.pdfIn PDF document text
    • https://duvozeja.weebly.com/uploads/1/3/0/7/130739152/6191098.pdfIn PDF document text
    • https://nerapusu.weebly.com/uploads/1/3/1/4/131438180/7705a0.pdfIn PDF document text
    • https://defelidiko.weebly.com/uploads/1/3/1/0/131070982/rugixafop.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/aLlx0hd/knight_joust_idle_tycoon_mod_apk.pdfIn PDF document text
    • https://merogowaxoku.weebly.com/uploads/1/3/1/0/131069891/4070988.pdfIn PDF document text
    • https://xifupanudolegu.weebly.com/uploads/1/3/1/1/131164204/67bc52c.pdfIn PDF document text
    • https://sufotope.weebly.com/uploads/1/3/0/7/130775917/4902655.pdfIn PDF document text
    • https://cdn.sqhk.co/lawikuto/eVpYMjf/scary_hayrides_near_me.pdfIn PDF document text
    • https://boginajidu.weebly.com/uploads/1/3/4/6/134693166/pogotogi.pdfIn PDF document text
    • https://giruwikepu.weebly.com/uploads/1/3/4/4/134464081/9518883634bda75.pdfIn PDF document text
    • https://retedavaliloxi.weebly.com/uploads/1/3/5/3/135393755/zozevopopezex.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/gezetega/anderson_lineages_of_the_absolutist_state.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/aspectjweaver._jar_1._8._13.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/3870772203.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/gemasad.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/lunarite.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_off0000c18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC18F 5792 bytes
SHA-256: b909e0a0a8ee30e2e64087c7ee448a8ba0701d24cc59d6042f94919b90457963
font_01_sfnt_off0000d548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD548 10108 bytes
SHA-256: 5abadcbea08e793881cc8db965dddecd20e82bbd2eb351bdde2245c6c7f7db6c

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