Malicious PDF — malware analysis report

Static analysis result for SHA-256 622806e81a252294…

MALICIOUS

PDF

71.8 KB Created: 2021-03-01 15:04:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2957f541969cfa81dcacea6f0709f69d SHA-1: 8b53abf03d776d37eaf32dcd8d76690f14130339 SHA-256: 622806e81a252294f3582d44abcade1d86a8db31a358ccc09ba65d61ca62b38c
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The primary URL points to a keyword search for 'supergnes apk download', indicating a likely lure for users seeking potentially unwanted or malicious applications. While no scripts were extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt.

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
  • 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://zajinet.ru/wix?keyword=supergnes+apk+download PDF link annotation
    • https://cdn.sqhk.co/papusabefo/hf2XghB/kibinafa.pdfIn PDF document text
    • https://cdn.sqhk.co/mozozezowos/hiCjbWd/bike_unchained_2_hack_mod_apk.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/8847654.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxiwugo/Oiajghj/31699706872.pdfIn PDF document text
    • http://rujokevawevi.22web.org/what_was_the_95_theses_all_about.pdfIn PDF document text
    • http://bukibiroxofin.22web.org/if_statement_excel_spreadsheet.pdfIn PDF document text
    • http://vugijow.iblogger.org/8688862680.pdfIn PDF document text
    • https://cdn.sqhk.co/kelarega/eWjiFpk/50701302752.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/ic0Kifo/saduzopadepetomo.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/b1jchiK/jungle_run_game_download_for_nokia_206.pdfIn PDF document text
    • https://cdn.sqhk.co/lizasizova/HBnggie/jojufukuvaka.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/ggVieib/nelusigarid.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/15997968212.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/5528388571.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/gghe7hg/how_to_play_minigames_minecraft_ps4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwemasux.myartsonline.com/modal_verbs_worksheets_for_grade_6_with_answers.pdfIn PDF document text
    • http://mawidinivetobi.myartsonline.com/kewowipivitefukudafedifa.pdfIn PDF document text
    • http://jefuxizimume.rf.gd/dedulawimisirapugu.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_off0000dc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC95 5384 bytes
SHA-256: 135b59dc71d757b6ef2e2d42bff8f1b8e59f19046d695d4d100bd8e9b2a5f971
font_01_sfnt_off0000ef09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF09 10276 bytes
SHA-256: 63bb578a5d4c8bce0703c1aa17b01b828f94d3ca543f1f61a609c4b032762d13

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