Malicious PDF — malware analysis report

Static analysis result for SHA-256 971fb58ccd65752d…

MALICIOUS

PDF

97.3 KB Created: 2021-04-25 10:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0357edb6bbc281000d09ecd1d23897ac SHA-1: 54ab903a817e560b827f17527e4cfe713ea82f2b SHA-256: 971fb58ccd65752d513c18010784fd44c06bab65eaf183b164e7f02aa6d27a76
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 0.9994

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://maypoin.ru/strik?utm_term=what+are+six+easily+observable+characteristics+of+living+things PDF link annotation
    • http://gnfcns.info/wotaberotegesorufosliujd.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/gjNhije/jikidekafo.pdfIn PDF document text
    • http://usacreditscore.info/ascending_and_descending_order_worksheets_for_ukglvsj4.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/74860473080wd2ea.pdfIn PDF document text
    • http://remontlegko.info/gapupurek0lya.pdfIn PDF document text
    • http://letabumo.getenjoyment.net/add_text_to_adobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_603837e52b45b.pdfIn PDF document text
    • http://50offstore.info/judekuwepikuxumovifa28snt.pdfIn PDF document text
    • https://cdn.sqhk.co/safimowexaw/hj6e3ib/dead_zed_unblocked.pdfIn PDF document text
    • http://apsdd54gfv.xyz/lumion_6_pro_download0tne2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474985/normal_604cfc53265d5.pdfIn PDF document text
    • http://simcars.ru/wamagakanofulagalavuc780.pdfIn PDF document text
    • https://cdn.sqhk.co/zujumatatub/QAhewhd/wazenedetowuzuxakira.pdfIn PDF document text
    • http://reawolt.online/cabify_argentina_appe3y23.pdfIn PDF document text
    • http://parrrtner.xyz/do_i_need_the_fios_quantum_gateway_routerh265i.pdfIn PDF document text
    • http://varistop.site/birosotewoxovinixonitutglo4b.pdfIn PDF document text
    • http://takipleskazan.org/hail_the_king_espaolep4sh.pdfIn PDF document text
    • http://aycotoro7.xyz/mogekexoriyxzud.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/ZjbGXje/gravity_ninja_telegram_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/u6ihLTk/49452898587.pdfIn PDF document text
    • http://linefofaxugedu.mywebcommunity.org/julefiwogozuxoxupejitik.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofepiropi.onlinewebshop.net/geometric_sequence_activity.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_off0001328f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328F 1604 bytes
SHA-256: a90f79d35b855d6e419c922e1c16a7f20c875ed03b3e5f8d6d8c2638309ac592
font_01_sfnt_off00013ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB2 5528 bytes
SHA-256: 31f22e67edc0cd2803e57c31f1e8c708fa26dc105bc3d0905812b679300958aa
font_02_sfnt_off00014d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D9C 12300 bytes
SHA-256: 375e480c335900434e7c3d47a8d241ca7eb52d23386796250d9d5791708ed5ea

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