Malicious PDF — malware analysis report

Static analysis result for SHA-256 320d33b69170fb41…

MALICIOUS

PDF

75.5 KB Created: 2021-05-15 05:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ac16e1fd928894cd56de7642983862a4 SHA-1: 10e97723e24dde3345666c6f9ee2eea655d66e10 SHA-256: 320d33b69170fb415de722c8277d33d3156fea20949e386af84fbf0178e2c487
186 Risk Score

Malware Insights

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

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 0.9995

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.
  • 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://dugedepap.ru/strik?utm_term=autocad+tutorial+floor+plan+pdf PDF link annotation
    • http://bestpriceforukraine.xyz/ipod_nano_user_guide53xqp.pdfIn PDF document text
    • http://indonesia2health.online/3222013628936eha.pdfIn PDF document text
    • http://azorocheat5.xyz/maytag_stackable_washer_dryer_not_spinningaf2lr.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/juzuguk_nasuwekewel_rajajizowogad.pdfIn PDF document text
    • https://tinonerapize.weebly.com/uploads/1/3/5/3/135349756/lumirekijewuj.pdfIn PDF document text
    • http://swiss-gear-top.xyz/calorie_counter_by_fatsecret_android_appbrt0a.pdfIn PDF document text
    • http://winoorama.site/tugigoxesdc5r.pdfIn PDF document text
    • https://zojufagilazit.weebly.com/uploads/1/3/0/9/130969654/xitefagimovuto_sekise_jifosule_wujeto.pdfIn PDF document text
    • http://talajifit.mywebcommunity.org/attestation_d_hbergement_la_banque_postale.pdfIn PDF document text
    • https://zedodunojoponex.weebly.com/uploads/1/3/6/0/136083391/ef516133d0ff3d.pdfIn PDF document text
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/5762539.pdfIn PDF document text
    • http://unlockdeals.shop/ruvekeforanivulavcgdhl.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/simple_business_plan_template.pdfIn PDF document text
    • http://wetiludivarag.scienceontheweb.net/kabegebolizusemukupa.pdfIn PDF document text
    • http://affilateapp.online/nwn2_favored_soul_stormlord_buildqek3n.pdfIn PDF document text
    • https://muxorapud.weebly.com/uploads/1/3/4/4/134455491/9736172.pdfIn PDF document text
    • https://wezunemoxojo.weebly.com/uploads/1/3/5/3/135321606/wiwoputufunijuxesuju.pdfIn PDF document text
    • http://prizinsta24.space/baixar_jogos_infantil_gratis_para_androidsk8yh.pdfIn PDF document text
    • http://gazajujana.mygamesonline.org/will_roku_work_with_alexa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1058d175-53f8-4d86-9201-ae9c1fc74009.filesusr.com/ugd/62a633_fb2fa65fb83f4bd3b5822ac72b6b3aa7.pdf?index=trueIn PDF document text
    • https://368af19b-b9be-4417-8ea7-dfc4611f9fec.filesusr.com/ugd/abd4c0_cd467df8b5724e6f9434aa039d3a3fbb.pdf?index=trueIn PDF document text
    • https://db7841a4-af10-4990-a2be-f084cd4acbf6.filesusr.com/ugd/e3c460_b8d470538256443dae03922c6a8fef3c.pdf?index=trueIn 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_off0000eae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE2 4960 bytes
SHA-256: 1887529cce0f3ecc88932a7323d60b5dbabfe5d8932a569cef4b914bd80b904c
font_01_sfnt_off0000fbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD7 10804 bytes
SHA-256: 7aa6dbf052b2ff320cd55b9f60929feefd7f47ce223581a0089cc568deb7ad3b