Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d71d2b0377f808…

MALICIOUS

PDF

94.0 KB Created: 2021-03-12 08:34:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3f45731e4ede69459f39b31472c89bff SHA-1: b61f7bbe3644d5c28ea37e08e5a7205027e56c04 SHA-256: 57d71d2b0377f808aa47eba5375d6cf3a811bc94d4e35b8d0b476d659504f473
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9997

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://jumiwimov.ru/award?keyword=dieta+para+ganar+masa+muscular+y+perder+grasa+pdf PDF link annotation
    • http://hookup682.site/65253049417fuyoo.pdfIn PDF document text
    • http://899themes-demo.ru/1822576828850qxt.pdfIn PDF document text
    • http://doucheop.xyz/troy_bilt_lawn_mower_carburetor_gasketl0fw2.pdfIn PDF document text
    • http://reduslimitaly-official.website/plan_cadastral_informatise_gratuitft0ok.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/how_much_do_army_reserves_make_monthly.pdfIn PDF document text
    • http://ninuwekevap.scienceontheweb.net/fadezemilarikoturowe.pdfIn PDF document text
    • http://fubikopelemom.mypressonline.com/is_my_drivers_license_suspended_in_michigan.pdfIn PDF document text
    • http://websporizle3.com/xusetixirerogataxb0e4b.pdfIn PDF document text
    • http://mitedujonajezed.scienceontheweb.net/my_cousin_rachel_1952_cast.pdfIn PDF document text
    • http://worldworkbook.com/59200159010ae3zl.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/xezofoxipewamuze.pdfIn PDF document text
    • http://rebezun.mygamesonline.org/tuwulalizanawan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuvarijes.atwebpages.com/bunuwimikijazili.pdfIn PDF document text
    • http://rodedewezijore.atwebpages.com/pdf_file_reducer_in_kb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02a984e-baa8-41c9-aab0-d90d00bbab1e/sixidiromexiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/296071c5-5942-4273-af72-39e9206d5e1b/google_maps_change_my_home_address.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ec286a6-c5aa-4e0c-ac90-a0921b74c85f/indian_vegetarian_cookbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6910146-a2ff-4d40-b844-e85390e61e1c/zapometajotemuripabijabi.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/wd_my_passport_ultra_2tb_read_write_speed.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/38270999357.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_off00012f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4E 5576 bytes
SHA-256: 2fbfd152c78a270285c2a898f3802f55b61ae90cce39b9ffcae3f703c4ec4649
font_01_sfnt_off00014241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14241 11836 bytes
SHA-256: a9b9624c209ae7e06c217b8031a479b4fb7f3f7b9fabdef242982045898a89f9

Open this report in the interactive analyzer, or submit your own file for analysis.