Malicious PDF — malware analysis report

Static analysis result for SHA-256 c265a30c479d4840…

MALICIOUS

PDF

87.8 KB Created: 2021-04-07 14:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2ead4d851a2036f6a28f6b735af3a3b1 SHA-1: 19548a3681695d28b41dbd157d07e0dcf51b243b SHA-256: c265a30c479d4840fa03958d2c7b4e257719b6430211e3655a2137044c4e5f38
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded URL `https://ponafet.ru/strik?utm_term=sony+hdr-as100v+as+webcam` is particularly suspicious and likely part of the malicious infrastructure. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • 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.
  • 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://ponafet.ru/strik?utm_term=sony+hdr-as100v+as+webcam PDF link annotation
    • https://luwanolukurodo.weebly.com/uploads/1/3/5/3/135397368/b3850519a46.pdfIn PDF document text
    • https://wirorovikematu.weebly.com/uploads/1/3/1/0/131071137/6313810.pdfIn PDF document text
    • https://cdn.sqhk.co/nikamegamu/tTidihg/offline_app_games_iphone_free.pdfIn PDF document text
    • https://kavirozix.weebly.com/uploads/1/3/3/9/133999962/d28b323b21e62.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/42193586385.pdfIn PDF document text
    • https://pigabatanez.weebly.com/uploads/1/3/1/3/131380253/xoxejon_juwira_totonezureraz_ranezunuxazetu.pdfIn PDF document text
    • http://present-mag.ru/vizio_e601i-a3_power_issueslrwa0.pdfIn PDF document text
    • http://netewe8.xyz/69090187464xc2f6.pdfIn PDF document text
    • https://semufukat.weebly.com/uploads/1/3/1/8/131857602/7741746.pdfIn PDF document text
    • http://fetesitomer.mygamesonline.org/lirubuxedezakojituxawux.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/PEXihgj/electricity_meter_reading_dubbo.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/biblia_ntv_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/vonewesipan/gi5jgzp/gopixa.pdfIn PDF document text
    • http://palogaza.sportsontheweb.net/rearrange_pages_sejda.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/jciirjd/diet_breakfast_recipes_lose_weight.pdfIn PDF document text
    • https://cdn.sqhk.co/xonudutixova/herFuSG/25281324965.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/kigavanus/57185700934.pdfIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_f7f606a15715463b8886b4c5d887c356.pdf?index=trueIn PDF document text
    • https://3315be42-5dab-4b6e-b44d-105cb490973e.filesusr.com/ugd/2e3488_22bdae24741044368030b322eab32428.pdf?index=trueIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_d86c4bf5efbf42b6907cc76e559dea73.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mulerux/70673453172.pdfIn PDF document text
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_9727b21b97304d8ea8c67210d684fac4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kufazete/62969934155.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/7370343227.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/formal_letters_meaning_in_punjabi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001000e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000E 2900 bytes
SHA-256: a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a
font_01_sfnt_off00010a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A50 5532 bytes
SHA-256: 0c32cd8c50a02fa97d7bfe2e87f0ded96d79e98b4e5b420e2a06b83fa971488c
font_02_sfnt_off00011cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF8 11204 bytes
SHA-256: 5ed559b4e6bea728ee946d15246bc19b6e14b977016cee82c5028fd20a809fff
font_03_sfnt_off0001432c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1432C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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