Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0287f0aba3358f…

MALICIOUS

PDF

78.7 KB Created: 2021-03-11 19:39:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 02af50bca8c6efad7e9339793622e581 SHA-1: cafb15c5470a5da561f79ee630758fa172d55ee7 SHA-256: 2f0287f0aba3358f5afc69ca5f94c68b4ac00f7bb6bc710f6fe3be350e87b010
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant portion pointing to disposable hosting and exhibiting characteristics of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the overall structure suggest this PDF is intended to redirect users to potentially malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/123?utm_term=powercfg%252F+batteryreport+error+0x10d2 PDF link annotation
    • https://gupuletafajural.weebly.com/uploads/1/3/0/7/130776102/pibawufered.pdfIn PDF document text
    • https://xavedogaw.weebly.com/uploads/1/3/4/6/134659805/jeboxelara-tagajigirog-tadalivene.pdfIn PDF document text
    • https://zizonilorixu.weebly.com/uploads/1/3/4/7/134772478/limulawewikixozudaf.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/muxuwes.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/259a7265-8732-4a5b-b650-3c1742a76996/sims_3_sunset_valley_families.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/392df17a-6a31-4445-af5b-74554a7fae40/what_bible_says_about_adultery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f0b4c8-f4a8-4bba-9fb2-786b89ccc4ea/thermodynamics_an_engineering_approach_5th_edition_solution_manual_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f68e71-7626-48e3-8e13-851b54c8daf6/lodofuzefa.pdfIn PDF document text
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_2183775f2e194c81904a61e795c603a7.pdf?index=trueIn PDF document text
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_df65e196aebb4babad92e515a8037f35.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5f4eb1f-615c-47a6-a102-913937adb654/mopajexumetojudikumud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9c96769-d991-46d2-b7ef-6347f3db710a/xexipolemetapovuvomosiz.pdfIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_805d45cc222546d9b17cf2882980159b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/649bc5be-9337-47cd-84e2-f2c4ed055975/how_do_i_set_up_my_hp_printer_to_scan_to_my_mac_computer.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_ba6adf6d37484867a18ad26746f7b870.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/677344c4-3c2a-4dd2-912f-9114d078696a/4571211034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81742676-3f0f-4053-a7c6-bbd03a4154f8/14418473718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b21458ae-1821-4373-8864-eb50bae33104/15669265063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03b5da80-951c-46aa-ad1c-ab995199dbc4/15652202942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38cc7373-bb9d-45e2-a65e-3f6f2618d986/6431023369.pdfIn PDF document text
    • https://50037ee0-0691-4a53-bdc2-b2f8f795cfa6.filesusr.com/ugd/b41a9a_60533b2ea30d4a318f2ae172bd15225a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/43f1b96d-bb1b-437a-a727-ed840102d00f/best_investment_book_for_beginners_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4724703a-90c7-4ff5-af99-c78bb19d25dd/wagner_power_steamer_715_reviews.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_off0000f1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AD 5876 bytes
SHA-256: f7637bbfef96e95c3681c8d6268773fe1d8d48a926b1d804c9a1df951548da16
font_01_sfnt_off000105e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E7 11608 bytes
SHA-256: 86ca0234c06c963c421cc38a4ef5a156c26ed2015e062129059ba178ef8e15c1

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