Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e0bc9d46b24011…

MALICIOUS

PDF

79.8 KB Created: 2021-03-25 04:25:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 07889e49dfc21b3d655dac25c51d730b SHA-1: c11154d36db549ca6448921215333e206f8886b9 SHA-256: 88e0bc9d46b24011d417cb5da8d9ed40e9c854ef9157e6f0cfcda69aa78afb06
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a site offering 'honors world history final exam study guide answers'. This URL, along with others hosted on disposable domains, suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the redirection of users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://midufefew.ru/wix?keyword=honors+world+history+final+exam+study+guide+answers PDF link annotation
    • http://zunowugijose.22web.org/savane.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/h757jjb/73604519566.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/cgdhbku/jumewikoduj.pdfIn PDF document text
    • https://cdn.sqhk.co/sixerusesebu/SnPSFjd/podopuwipamife.pdfIn PDF document text
    • https://cdn.sqhk.co/fewisezux/LpghiiN/wales_online_bridgend_council.pdfIn PDF document text
    • https://cdn.sqhk.co/tojegaxamox/iejf7hg/candy_crush_jelly_saga_cheat_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://firiviwitike.epizy.com/anastasia_once_upon_a_december_piano.pdfIn PDF document text
    • http://dofarebezek.rf.gd/82709173570.pdfIn PDF document text
    • http://falalovoxiwada.epizy.com/curriculum_vitae_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/resumo_quimica_organica_nomenclatura.pdfIn PDF document text
    • http://mosujala.rf.gd/gcta_law_tagalog.pdfIn PDF document text
    • http://gedikoti.epizy.com/5046881240.pdfIn PDF document text
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_901fe00a03a043b887ef11cd746a1db3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tomaxade/58639684831.pdfIn PDF document text
    • http://releboxodaw.rf.gd/75948794844.pdfIn PDF document text
    • http://tejutavufoxif.epizy.com/keto_reset_diet_food_list.pdfIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_c5cb588bf1e44e3ba14ecb9e31a2488e.pdf?index=trueIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_37963f36716741f2a0869996ec2cbe79.pdf?index=trueIn PDF document text
    • http://gefifeji.rf.gd/68405296491.pdfIn PDF document text
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_18992cb2007840c999e81e145c5315fc.pdf?index=trueIn PDF document text
    • https://f568b852-d776-40fc-afde-b4c2ef929a3a.filesusr.com/ugd/2d6fb2_e5f4a4a41a7a41038df7b48205c54504.pdf?index=trueIn PDF document text
    • http://jabegijazuxag.rf.gd/joomla_admin_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/lunorewipovinugutirelesas.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/stalker_instagram_pro_apk.pdfIn PDF document text
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_5d227f2b090643e4897657206c59355a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/the_curious_nature_guide.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_off0000f5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D0 5544 bytes
SHA-256: f793de7f17cbeb2bd9cac26e58929c55ba2d8ac2f1aa8fde44ecc10cb1d77f1d
font_01_sfnt_off0001089d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089D 12328 bytes
SHA-256: 40032f4994a83ed80820cd1b0b4cd7493ac33640ac5ab8889abb8ed0b5b9ea8b

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