Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f34424ff5afee3a…

MALICIOUS

PDF

82.1 KB Created: 2021-03-20 11:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 63726d768ae07fa3b14704c9f1af070e SHA-1: b303ebee8e9ac3f92d1740e8341710a2a25586c1 SHA-256: 9f34424ff5afee3a072a09f2f536c59053df34ae5211836488150b08dc17f07d
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The embedded URLs and the document body suggest a lure related to 'Pma 2020 graduation' to direct users to external sites. The presence of external URIs and link farm characteristics further support a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=pma+2020+graduation PDF link annotation
    • https://cdn.sqhk.co/tuxikotimux/2jeFieJ/informacion_sobre_el_aparato_locomotor_en_ingles.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/vojulog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413347/normal_600b6aa0b0aa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424951/normal_5fe8806bb2555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_603053e0a84d2.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/Vjjhffp/vomimerojuzikemimawunop.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/42681165130.pdfIn PDF document text
    • https://cdn.sqhk.co/wusosekame/nskmtuW/56136796488.pdfIn PDF document text
    • https://cdn.sqhk.co/dumudegurit/hcjglhb/48543012427.pdfIn PDF document text
    • https://cdn.sqhk.co/pewesopefim/ijhaOjc/woodcarving_illustrated_comfort_bird.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bojonovaja.rf.gd/43190824319.pdfIn PDF document text
    • http://xududaziparazo.rf.gd/tijakemofok.pdfIn PDF document text
    • http://femolejo.epizy.com/72364258046.pdfIn PDF document text
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_814082b799014546929f11e6a773af6f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zonivezada/drivers_ed_to_go_answers.pdfIn PDF document text
    • http://risawanidav.epizy.com/72762856246.pdfIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_e479463b877940909cdd89f162ee71fd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fapaga/linikirosusapuwu.pdfIn PDF document text
    • http://sewasijibakel.epizy.com/atari_2600_emulator_games.pdfIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_02ed71e2d1d74f2393d88a4665e6c58d.pdf?index=trueIn PDF document text
    • http://bejanifezilo.atwebpages.com/mavibiwus.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_off000102dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DC 5208 bytes
SHA-256: 3b0f04614e9f4e6fdee3d57887542bd02afb191e7f0d8f632428885680bf53cc
font_01_sfnt_off00011478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11478 11516 bytes
SHA-256: efe2088b7bb8d7fdeb1d54d99bc0ed85d784ebc84e101d1c18427c91607725a5

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