Malicious PDF — malware analysis report

Static analysis result for SHA-256 20cfcac40c165fb5…

MALICIOUS

PDF

77.8 KB Created: 2021-02-13 07:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 987f3c74c499ae6a574fbee4264210b4 SHA-1: d9c3f333012369e9e4ecf2df728515bac2281f06 SHA-256: 20cfcac40c165fb57cd2ce9acd94fd8632d994316a477ec321a6277812eda992
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=fortitude%20season%204%20episode%20guide In PDF document text
    • https://daradila.weebly.com/uploads/1/3/1/4/131438164/085820bead8058.pdfIn PDF document text
    • https://wotujajatedigi.weebly.com/uploads/1/3/5/2/135295120/vizowu.pdfIn PDF document text
    • https://wuxavuzipirugud.weebly.com/uploads/1/3/4/0/134012349/komabexogavomog.pdfIn PDF document text
    • https://bipekafus.weebly.com/uploads/1/3/0/7/130776646/tuwisikomuxalof.pdfIn PDF document text
    • https://nonedavoxezi.weebly.com/uploads/1/3/5/9/135956696/8670966fd9.pdfIn PDF document text
    • http://playmarket-online.com/glamour_photography_poses9lqhk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371800/normal_5fcb5a94cc3a8.pdfIn PDF document text
    • https://vinofuloro.weebly.com/uploads/1/3/4/8/134850824/kovofi.pdfIn PDF document text
    • https://migomazi.weebly.com/uploads/1/3/1/4/131407029/xevikedaxefuwulexi.pdfIn PDF document text
    • https://tekudijasefemo.weebly.com/uploads/1/3/2/7/132740256/3812555.pdfIn PDF document text
    • https://dopapixe.weebly.com/uploads/1/3/1/3/131383645/rumoxuf_fidiser_lapoxes.pdfIn PDF document text
    • http://daating19.site/candy_crush_for_pc_free72h7f.pdfIn PDF document text
    • http://1xbets-reg.site/65820937083e6td8.pdfIn PDF document text
    • http://my-credit.info/706283202597hzlp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dunupilopun.epizy.com/hack_squat_machine_correct_form.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_off0000f62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62F 5136 bytes
SHA-256: 398d021e76d684403ed3496c75e897b3748f330a0b59b78d877c3d3465ed65b5
font_01_sfnt_off000107bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BF 10140 bytes
SHA-256: 9a874895209ee0e1e02ee3759209c7dae399fef8c0e21b8691c59b154038e933