Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf6e93185ca6257…

MALICIOUS

PDF

75.1 KB Created: 2021-03-24 03:48:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 52c0cca4519431856054411c398a006d SHA-1: a8bbb3dd85f8a3ae0fbed6610e85cf2a92b08192 SHA-256: 1bf6e93185ca6257d541b75c35fee0b09bbc6afb3ac5ff8793e7643fc89ef1e0
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links pointing to various PDF documents hosted on disposable domains, indicating a link farm or SEO manipulation scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to distribute further malware or phishing content. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document, potentially used as a lure in a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/wix?keyword=the+guide+narayan+summary PDF link annotation
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/5e4c76c2caab29e.pdfIn PDF document text
    • https://wajovojov.weebly.com/uploads/1/3/4/6/134652085/2209492.pdfIn PDF document text
    • https://vivazezege.weebly.com/uploads/1/3/4/0/134041722/sepekujenerak-tigilawez-fuxobubebeg-telaw.pdfIn PDF document text
    • https://bemetezebore.weebly.com/uploads/1/3/4/8/134882820/wubazuxazaraz.pdfIn PDF document text
    • https://fevokixesebu.weebly.com/uploads/1/3/0/7/130776230/9159938.pdfIn PDF document text
    • https://valuzobuxile.weebly.com/uploads/1/3/2/7/132711949/kejewomovajupefagulo.pdfIn PDF document text
    • http://lutusogugifuj.iblogger.org/what_is_freedom_for_you_essay.pdfIn PDF document text
    • https://nugaxuraru.weebly.com/uploads/1/3/5/3/135388114/kowuxomifi_jodogifawikabub_nubatetoxolozi.pdfIn PDF document text
    • https://nafezukame.weebly.com/uploads/1/3/2/3/132302716/10294.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/duracell_cef_14_n_nimh_battery_charger_instructions.pdfIn PDF document text
    • https://fusavufotopos.weebly.com/uploads/1/3/4/6/134634064/7514209.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/clover_pos_system_rates.pdfIn PDF document text
    • https://palukenibimel.weebly.com/uploads/1/3/4/4/134401756/rodito_susiwe.pdfIn PDF document text
    • https://kaginugopaz.weebly.com/uploads/1/3/4/3/134310825/dfa0c0b20.pdfIn PDF document text
    • http://fojukivijivik.medianewsonline.com/why_use_text_features.pdfIn PDF document text
    • https://bejokezogakuji.weebly.com/uploads/1/3/2/6/132695802/gunubikixakumilapiza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c363ea-dab1-468d-b0fc-3b6f6024e655/karusaxogumeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43ee2eea-899b-4b73-b454-e7e1186732b8/bamovogomulemefale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e1e01cd-1b9c-49e8-a7a0-e13fa02f71a1/survival_horror_movies_list_imdb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a44238a-72fc-43bd-8b99-e9ba3d4548af/warcraft_3_cheats_custom_game.pdfIn PDF document text
    • http://xojaxalevigob.epizy.com/nuvagel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7ecf75-d50a-472a-8dd2-ffd70a10c282/attack_on_titan_season_4_episode_1_release_date_us.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_off0000e8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D3 5260 bytes
SHA-256: 07ba3ce2cb7ac68b049cccfdfd741946cbcf880da171804a96514b3a8108cc15
font_01_sfnt_off0000fa91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA91 10636 bytes
SHA-256: 8ff1b78bbe53e8e00c64711b643b2b5d8dbc1c94bd8c37b3a80d6b9cc6101eb3