Malicious PDF — malware analysis report

Static analysis result for SHA-256 868036f2033194b5…

MALICIOUS

PDF

82.5 KB Created: 2021-03-15 09:06:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7207bbf8138ceb1540679228c6f7fe76 SHA-1: 1c5a6b2f1e2cee65a436b52238b3a3db3e566891 SHA-256: 868036f2033194b553fb9aa2bcd33d6cc630207eb50ce05858a4b97ced3b821c
126 Risk Score

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 0.9990

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/123?utm_term=circular+functions+exact+values+worksheet PDF link annotation
    • http://cardioactiveitalia.site/78259729303iskzv.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/796903567.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/xosixa.pdfIn PDF document text
    • http://cleanup-sale.site/clarke_cochrane_christmas_classicvhmz6.pdfIn PDF document text
    • http://hydrofthol.space/widaxurovi51zec.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/moganar.pdfIn PDF document text
    • http://sukutoxuwurif.mywebcommunity.org/sutatasinajexegup.pdfIn PDF document text
    • http://waparudadip.mywebcommunity.org/epilepsy_in_dogs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b26998df-fd38-47e5-80f5-26749f12cae6/what_mental_illness_causes_hallucinations.pdfIn PDF document text
    • http://subejev.rf.gd/tegukuvidif.pdfIn PDF document text
    • http://tononade.rf.gd/43459503304.pdfIn PDF document text
    • http://nupakavidowux.epizy.com/jopatubideses.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/all_american_pressure_canner_915_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/13336585675.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/68065900331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e7c25bb-d20d-496e-951c-1358792f0120/camp_x_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e017fae4-65dd-4101-8251-ebb15273df58/detudakup.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/8006523878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/971288a1-6aa8-4363-812b-0b238399dedf/asm_handbook_vol_11_-_failure_analysis_and_prevention.pdf.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/24607468610.pdfIn PDF document text
    • http://lewafozilit.epizy.com/mr._coffee_coffee_maker_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e87d0b8b-31e5-40e3-b780-2ece0b0d2b6e/petsafe_yardmax_cordless_in-ground_fence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59ae2fd6-ddcc-4aad-927e-8651ca3d6c17/gavagaxevaxaraxawuvir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df1a2f52-d201-4a7e-9cbd-e36acd8b571e/84367105880.pdfIn PDF document text
    • http://kavimefejemud.rf.gd/incident_report_format_letter.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_off0000f52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52A 5160 bytes
SHA-256: 570f9493007338f97c36776323da561d7ed7bd4ed0e640443cd2e46a6e3a0a23
font_01_sfnt_off000106c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C5 11064 bytes
SHA-256: adb2897ae3042f1c81ad0afdb7330c5ff8340892b3ec1e4b57c7d7f36c17e33a
font_02_sfnt_off00012c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378