Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a477cc1fa1c32e1…

MALICIOUS

PDF

71.7 KB Created: 2021-02-13 17:19:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: be416d1f5fd63fdbd7d58d8ac11577d3 SHA-1: 05c9db439a4352c58c0acf8074e955adb0739d27 SHA-256: 8a477cc1fa1c32e18ef082cef9af758002c9289f8eeb19d8438ba45114ad06dd
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to 'baarspo.ru' and another URL 'getoditatogufop.22web.org', both associated with link farming and potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://baarspo.ru/wix?keyword=poe+witch+builds+ps4 PDF link annotation
    • http://getoditatogufop.22web.org/bu_admit_card_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411270/normal_5fdcdcecb6f22.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/7ggYDAz/speed_night_3_asphalt_legends_download.pdfIn PDF document text
    • http://hookup154.space/8615102360hglx0.pdfIn PDF document text
    • http://golipodib.22web.org/dorijosaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460463/normal_5fcf4b2830591.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376609/normal_5fef7b1ebfced.pdfIn PDF document text
    • https://cdn.sqhk.co/fusevesapime/tgJhjhf/18498302331.pdfIn PDF document text
    • https://cdn.sqhk.co/peruvereraba/gjibCpb/23313057359.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwilaj/hjieHig/simple_music_player_app_review.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvezunotumu/5mojGmP/sago_mini_puppy_preschool_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bivezekamolekaz.rf.gd/28767463833.pdfIn PDF document text
    • http://kixixiwibatogit.epizy.com/gomugi.pdfIn PDF document text
    • http://medojowibapij.epizy.com/don_t_starve_hamlet_beginners_guide.pdfIn PDF document text
    • http://togipumenotu.epizy.com/website_builder_apk_free.pdfIn PDF document text
    • http://nokizotef.rf.gd/filmora_blockbuster_collection.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD199 3184 bytes
SHA-256: 89ad1424bb0425c8ba20edeafab1c7719ef5ed16fc60a71919be2faa37384d12
font_01_sfnt_off0000dd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD09 5176 bytes
SHA-256: 1614113a82003ee5da9f31c09f2ccc4c9c1253ab05a6453dcdf124f26d08a42b
font_02_sfnt_off0000eeb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB6 10280 bytes
SHA-256: 7620f612cea0d35bf9517c389add92a79ee0d596c7931b585bcc6d61a3636984

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