Malicious PDF — malware analysis report

Static analysis result for SHA-256 b873f60782045bf7…

MALICIOUS

PDF

73.5 KB Created: 2021-02-09 23:13:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b1b535a4a35595a350fabdcaf0d4ada SHA-1: 0c1c4820d935fe2d3579171b2d998598e0201aa3 SHA-256: b873f60782045bf7942182356bf102ef2bab8c70bc8bdbbfec56e49dfe3956bb
116 Risk Score

Malware Insights

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

The PDF document contains numerous external links, characteristic of a link farm or phishing lure. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, likely for a scam. While no scripts were explicitly extracted, the presence of many external URLs suggests a potential for further malicious activity or redirection.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://bologen.ru/wb?keyword=crs%20reporting%20deadline%20hong%20kong
    • https://cdn.sqhk.co/kitatoze/dZh7jgY/slogan_save_mother_earth_quotes.pdf
    • http://shoes-storie.club/26489674396pkv86.pdf
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/jeruvagepigutaw.pdf
    • https://cdn.sqhk.co/rowavarop/cXEgghS/96948402671.pdf
    • https://cdn.sqhk.co/mikevoponage/hehnges/smart_connect_reel.pdf
    • https://cdn.sqhk.co/vusanutoj/hc4KhgY/buy_real_twitter_followers_paypal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://waxukoke.epizy.com/73075336864.pdf
    • http://xovipofeguz.epizy.com/banjo_movie_song_wapking.pdf
    • http://wivonuwexewixir.rf.gd/lubunuvirut.pdf
    • https://s3.amazonaws.com/labitajaxatufib/72997323910.pdf
    • https://s3.amazonaws.com/tosevud/70469985199.pdf
    • https://s3.amazonaws.com/kosamupim/javascript_tutorialspoint.pdf
    • http://jobifizokugo.rf.gd/45006209890.pdf
    • https://s3.amazonaws.com/ponivotigegepub/google_sheets_vlookup_from_another_spreadsheet.pdf
    • http://votofeki.epizy.com/simovolovirar.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e34b.bin
78ab9744f53d244c363eaa3de0c3ec65cdf1397bfce9f11bb84a48860e7ce8b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE34B 5192 bytes
font_01_sfnt_off0000f4e2.bin
08f6c200dc5236c0e6bbd649da34194adf1b573087fb3c476d03eec3c48962fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E2 10728 bytes

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