Malicious PDF — malware analysis report

Static analysis result for SHA-256 440107f05e81b2de…

MALICIOUS

PDF

71.2 KB Created: 2021-04-02 19:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 742ed06506458752cb9a7d3724f43592 SHA-1: ad71ba85a87f9ffcad54e4bc44b0f168d82c0d53 SHA-256: 440107f05e81b2deb89d5d40dbc4f2377332bb3cfec69b861a40071d6da1f2b5
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, disguised as a dictionary download. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/award?keyword=oxford+dictionary+english+to+sindhi+pdf
    • https://cdn-cms.f-static.net/uploads/4470985/normal_60598ec2c713b.pdf
    • http://mibotirekusiw.mywebcommunity.org/propiedades_del_aguacate_hass.pdf
    • http://fatozod.iblogger.org/html_to_online_api.pdf
    • https://cdn-cms.f-static.net/uploads/4388819/normal_5fda8cc354858.pdf
    • https://botimosiwipam.weebly.com/uploads/1/3/1/3/131398053/6022122.pdf
    • http://xapiduxirob.mywebcommunity.org/losizibelevojewar.pdf
    • http://mitutepoka.medianewsonline.com/vpi_pet_insurance_claim_form.pdf
    • http://fastpeysistem.online/vobidumubijulupuzemagemil3n1k.pdf
    • http://manoligixave.66ghz.com/creating_word_templates_online.pdf
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/mivejolar.pdf
    • https://gamuzajebi.weebly.com/uploads/1/3/4/4/134481120/36acc3.pdf
    • http://fakaripeti.xyz/vizumesiduxorodll4t.pdf
    • https://tedotedonux.weebly.com/uploads/1/3/0/7/130775879/ff6a913554068bb.pdf
    • https://xubidanata.weebly.com/uploads/1/3/4/8/134895671/zuroj.pdf
    • https://fagojature.weebly.com/uploads/1/3/3/9/133987822/luvefo_jutuwixuvu_zabekeluba_kadeja.pdf
    • http://milanbeach.fun/isometric_piping_drawing_software_freero771.pdf
    • https://silemixijotin.weebly.com/uploads/1/3/4/4/134463531/1041090.pdf
    • https://jubiporosevuzu.weebly.com/uploads/1/3/2/6/132695682/dujekixesujevif.pdf
    • http://tevaruv.sportsontheweb.net/pojab.pdf
    • http://idealslimitalia-official.site/naval_aircraft_maintenance_manualuplze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://senegowafev.epizy.com/broadcast_package.pdf
    • http://poziluxolebulu.epizy.com/bacterial_genome_database.pdf
    • http://safedoguno.onlinewebshop.net/sesabititewolukozovos.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dabd.bin
5b39476ea3f81eb1396498e2fad23042df60ad9cd6f79d535b7ad347eaa8dae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDABD 5616 bytes
font_01_sfnt_off0000ede7.bin
28e9a6a99f3ebea4629c95d911598b8b572d5c784be3507126fd5e820bfc93f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE7 9872 bytes

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