Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc951273d658f9f…

MALICIOUS

PDF

74.5 KB Created: 2021-04-01 01:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5530a5f0b6cc2f1e0e818fe1ef287860 SHA-1: cfb5f6dcd199a0875c29940a37f4272e7f4d8d40 SHA-256: 2cc951273d658f9f3f61b7b111ffb78643a1285c35fbf115602b2ae69fd2dfff
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain, likely intended to redirect the user to a phishing site or download a secondary payload. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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://jumiwimov.ru/strik?utm_term=how+do+i+turn+off+my+bushnell+neo PDF link annotation
    • https://xegafifa.weebly.com/uploads/1/3/0/7/130776616/vefevemubameb.pdfIn PDF document text
    • https://dibetoxiruvon.weebly.com/uploads/1/3/5/4/135400859/beraxexat.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/99166266744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477167/normal_6046db867b52d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488100/normal_5fffb4560ad90.pdfIn PDF document text
    • http://sumapewub.getenjoyment.net/muleteru.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/troy_bilt_pony_tiller_wheels_wont_turn.pdfIn PDF document text
    • https://wobofosowipifir.weebly.com/uploads/1/3/0/7/130776138/5b6e2bcd8f62e38.pdfIn PDF document text
    • http://paxijivatebul.getenjoyment.net/microsoft_sql_server_management_studio_2020_r2_manual.pdfIn PDF document text
    • http://tuwuradozanava.iblogger.org/hp_pavilion_beats_audio_drivers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408004/normal_5ffd6a9eeb9e4.pdfIn PDF document text
    • https://moxusovilala.weebly.com/uploads/1/3/0/7/130738705/tobute_nojisijasezo_rideneratatu_sobifixosi.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/7f064431-e13d-4239-9b72-a6631f6cbd6f/identify_which_of_the_following_accounts_would_be_included_in_a_post-closing_trial_balance_quizlet.pdfIn PDF document text
    • http://finirigitu.rf.gd/brayton_cycle_example_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/juzaxefuvokunimepofujekav.pdfIn PDF document text
    • http://febatejo.rf.gd/53820067917.pdfIn PDF document text
    • http://jibafotapat.epizy.com/adding_and_subtracting_negative_numbers_rules.pdfIn PDF document text
    • http://rogomore.myartsonline.com/tarafixiril.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff162747-d67b-4145-ac84-59b87b6ff528/xegusisedatitudomag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4c3b8a8-cab0-4987-aaa9-c3a3e3a3dee4/kagujaline.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/cabinet_minister_of_odisha_2018.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_off0000e683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE683 5232 bytes
SHA-256: 3aac5687e390ef92fbfc9573bc031adb29ef156675fec64765b596ac6fb99349
font_01_sfnt_off0000f837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF837 10652 bytes
SHA-256: 18b2ce147d8ead69bb16bbbbaef1ef10a19e75bfaa9605b884ce25cde54d8a9d

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