Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b07315508061781…

MALICIOUS

PDF

74.1 KB Created: 2021-02-16 23:49:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5e8181b75fbdb4cfc9b7637585fadbc4 SHA-1: 0167a06c1513bca07e8462c3d1a6d12b611135eb SHA-256: 8b0731550806178117d7fa87a1853cef96ee261acd1e85fe41ca38310ba1d871
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. The document body and embedded URLs suggest a lure to download an Android application disguised as a game hack. The presence of an external URI pointing to a .apk file strongly indicates a malicious download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=hariox.apk1+hack+pixel.gun.3d.apk PDF link annotation
    • https://zovejesuvenej.weebly.com/uploads/1/3/1/4/131438366/mimefirarifove_futemanulon_benoxajun.pdfIn PDF document text
    • https://voxonororipesap.weebly.com/uploads/1/3/5/3/135383222/1266907.pdfIn PDF document text
    • https://rojurunonujimos.weebly.com/uploads/1/3/5/3/135325454/kuvoxijofapemi-subukovalufe-luvujazij.pdfIn PDF document text
    • http://zinobinipote.22web.org/divinity_ii_original_sin_guide.pdfIn PDF document text
    • https://raxopukefafifi.weebly.com/uploads/1/3/2/6/132695755/vezovilivu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vutakeba.epizy.com/77873168406.pdfIn PDF document text
    • http://selepag.rf.gd/charthouse_primary_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/reformed_baptist_churches_in_ca.pdfIn PDF document text
    • http://sawopirorafo.rf.gd/multi_step_equations_worksheet_5th_grade.pdfIn PDF document text
    • http://bimuvugibane.rf.gd/essay_on_4th_industrial_revolution.pdfIn PDF document text
    • http://gotelunokokipu.rf.gd/72869507046.pdfIn PDF document text
    • http://fisazivibutaz.epizy.com/barsaat_ki_raat_1960_ming.pdfIn PDF document text
    • http://sokobob.epizy.com/capital_one_employee_email_format.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/comparison_adjectives_worksheet.pdfIn PDF document text
    • http://rowagaparik.rf.gd/10299372521.pdfIn PDF document text
    • http://kotowadanoli.epizy.com/practical_kabbalah.pdfIn PDF document text
    • http://xufivutuxalug.rf.gd/aastha_gill_images.pdfIn PDF document text
    • http://zovogimobidel.rf.gd/88851799530.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC540 3136 bytes
SHA-256: 3a875c0223368313a1f0cd2d5029ff7d0239cb4bebe45b523fdb3fdcc0643dda
font_01_sfnt_off0000d076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD076 5496 bytes
SHA-256: f530fec31c38114e2c4b846de21c941826243df94e4ac8fddd402a1a3f42d744
font_02_sfnt_off0000e331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE331 10044 bytes
SHA-256: 733bd61444775792460dbdc89cfce8159665cf89c0bd01d265a46943c118c9e4
font_03_sfnt_off000105d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D7 16068 bytes
SHA-256: e7273338525a866f49bd556f13a0e46ce1e8513f85f175d9d987aa1f8b89adb9