Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8483cafa9c9ee81…

MALICIOUS

PDF

88.2 KB Created: 2021-03-14 04:20:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: c9636deace02c65b617980da7cd81756 SHA-1: 6d6f6af7c94ce8f36f7bc6f8a74706b5d7c7c13f SHA-256: b8483cafa9c9ee815371e9525546ec985c4c9c87b6d1cd8ab0c1c848a36aa9c2
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://xezojetit.ru/award?keyword=possessive+pronouns+worksheet+with+answer+key+pdf PDF link annotation
    • http://xomofaki.getenjoyment.net/sonoma_covid_rules.pdfIn PDF document text
    • http://dokukuke.mypressonline.com/definition_of_social_marketing.pdfIn PDF document text
    • https://lowujowe.weebly.com/uploads/1/3/5/3/135320741/jakazodoritugur_gojupezusenojim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453885/normal_5fee9baadfec3.pdfIn PDF document text
    • https://kerijifulonuf.weebly.com/uploads/1/3/5/3/135328136/giwapanigefi_tiwetevewalon_fixuwatiliv_jozesifesevesam.pdfIn PDF document text
    • https://lewotivegil.weebly.com/uploads/1/3/4/3/134320996/d4820372f5a5.pdfIn PDF document text
    • https://vofovolovun.weebly.com/uploads/1/3/1/4/131483423/614638.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/midefin.pdfIn PDF document text
    • http://bamirajewenexo.medianewsonline.com/what_is_the_coldest_place_in_the_united_states.pdfIn PDF document text
    • https://xesanojazal.weebly.com/uploads/1/3/0/9/130968931/8fbefd7b3209.pdfIn PDF document text
    • https://gosasolana.weebly.com/uploads/1/3/4/5/134523876/9039544.pdfIn PDF document text
    • https://xugugizebe.weebly.com/uploads/1/3/1/4/131482894/5857554.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/wobipijuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474170/normal_604a4a4a43b9e.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/sharp_air_conditioner_parts_australia.pdfIn PDF document text
    • https://mirenixumevi.weebly.com/uploads/1/3/5/3/135309561/fiwedadez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389823/normal_5fc72a1445ac5.pdfIn PDF document text
    • http://zitarekatinupas.sportsontheweb.net/wopasujilawedevikut.pdfIn PDF document text
    • https://lojexidipiwakif.weebly.com/uploads/1/3/4/0/134041559/figet-fazin-zajenata.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://riveminigokoxa.myartsonline.com/tajusupolasisowolij.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/ben_10_alien_force_season_1.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/61459755487.pdfIn PDF document text
    • http://bafuwujix.atwebpages.com/catching_fire_full_movie_online_free_123.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 5416 bytes
SHA-256: 76e560b880f1150283ebabb086290cf9e0e34b2f2a7b9d9673984079fcaee605
font_01_sfnt_off0001026d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026D 3740 bytes
SHA-256: 49a7b6a6022ad0750f3ce9b713f85c7cd2f2c955e32e46ddff28ce33b45939fd
font_02_sfnt_off00010de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE7 10436 bytes
SHA-256: c9c3a414fc9bff33cfa90ccc1cd02b55754ae68f6a236ca7b99d793a931da200
font_03_sfnt_off000131f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F2 10316 bytes
SHA-256: 01e5401ce3969159638bbb16535cceeb57e95ea396e0ca76ee071f55f042d6e5

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