Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2876e9e1734eab8…

MALICIOUS

PDF

74.1 KB Created: 2021-02-17 04:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8e9d8d8df6fee0c05ceded0ee406e4f7 SHA-1: 16609ef64cf7e74ffa176435763276b209c8e719 SHA-256: f2876e9e1734eab89a48091e65c4f16c623878ef79aebd92863235261d6a3dfa
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://crophysi.ru/123?utm_term=troy+bilt+weed+eater+tb32ec+spark+plug PDF link annotation
    • http://amorexpo.com/10410629722qma94.pdfIn PDF document text
    • http://my-favshope.online/pms_to_cmyk_conversion_chartm6hhb.pdfIn PDF document text
    • https://cdn.sqhk.co/wutalididow/dA04Jij/tujene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481673/normal_5fda82881b629.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/TZXjaHK/90541084167.pdfIn PDF document text
    • http://tricitysikhs.com/american_airlines_pilot_salary_per_hourd7vjg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480750/normal_5fc88fecc0b75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445890/normal_5fe2e413c3191.pdfIn PDF document text
    • https://cdn.sqhk.co/juvanejejuwo/A1jehfd/rumeso.pdfIn PDF document text
    • http://filanion.online/video_cutter_and_joiner_with_crackq6h24.pdfIn PDF document text
    • http://letnesil.xyz/cambridge_ielts_9_listening_test_1_youtube334xs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445570/normal_5ffd9cacead80.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/bVVhcgd/yellow_book_cdc_indonesia.pdfIn PDF document text
    • https://cdn.sqhk.co/fusaduxuw/N3hjPr6/download_org_2021_mod_vip_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jofijoju/dkMief8/fewagipab.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/gokolejuwufodimuqhip.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/egRjdhd/redevofivuza.pdfIn PDF document text
    • http://gufutaca3.xyz/54790716706t18xd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468289/normal_5fef5035b2da0.pdfIn PDF document text
    • https://cdn.sqhk.co/kujotukil/zggcXii/airline_tycoon_evolution_cheats.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F0 5884 bytes
SHA-256: d08f33d750e1e12b1aa4cda2d4466fadfb37a5a6c360b3195427c76e117ebc88
font_01_sfnt_off0000f523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF523 11164 bytes
SHA-256: 37a7ef5292d4506c515c9a6deaa0c01f6ea3b89ce069e0e002fee9e4aaf01b26

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