Malicious PDF — malware analysis report

Static analysis result for SHA-256 429c97e2b9d6a668…

MALICIOUS

PDF

76.6 KB Created: 2021-02-28 22:35:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 204a84a334987310d8ae7632cba46fb2 SHA-1: bf7b504549351fca952a48a31635c053c22cb0fe SHA-256: 429c97e2b9d6a668b472fa89703875cf0d030d07f277e192bcd28b5c48f50ba6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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://resalured.ru/strik?utm_term=gre+test+dates+2020+21+india PDF link annotation
    • http://strita.space/kotofogegngml.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/r6hjUgd/rewofewolisuxaresa.pdfIn PDF document text
    • http://fubikopelemom.mypressonline.com/patezerinabi.pdfIn PDF document text
    • https://wojamoze.weebly.com/uploads/1/3/4/4/134479738/6509041.pdfIn PDF document text
    • http://wirelessinfo.ru/read_the_pact_by_sampson_davis_onlin1k13l.pdfIn PDF document text
    • http://waferaboteb.mypressonline.com/asmaul_husna_mp3_download_hijjaz.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/commerce_sync_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/gigepiwej/tCviehj/check_twitter_followers_and_unfollowers.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/c563037.pdfIn PDF document text
    • http://vbruti.site/kathi_mela_kathi_album_songs_isaimizl2v4.pdfIn PDF document text
    • http://odemebayisitrafik.com/emporea_fan_pager7v5y.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/71ROjg3/90279983896.pdfIn PDF document text
    • https://cdn.sqhk.co/lepapina/gggjgeX/10423574640.pdfIn PDF document text
    • https://nupetumagapet.weebly.com/uploads/1/3/1/8/131859993/fa7dfd08494.pdfIn PDF document text
    • http://matras-24.ru/86070037336ew07j.pdfIn PDF document text
    • https://zivexuxa.weebly.com/uploads/1/3/1/8/131871677/xikokudamo-kiboweba.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/lofese/form_facade_laravel_5._4.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/are_harry_potter_movies_on_any_streaming_service.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/descargar_adobe_spark_video_apk.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/totikoxumalavonazenumexaj.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/jobil.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/65898884430.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/aspen_hysys_v9_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/hydrostatic_and_aerostatic_guideways.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/fupakejew.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_off0000ee6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6C 5144 bytes
SHA-256: 39089fa6f2ed6514c36bc8d54a246d2f6360c8a22e7869f4a4754b038fbf787a
font_01_sfnt_off0000fffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFE 10868 bytes
SHA-256: 54062926fc5ed0d64c23cec8b1045810122295475c5b806b6d93cb7ff4644933

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