Malicious PDF — malware analysis report

Static analysis result for SHA-256 303613f4fb5d2360…

MALICIOUS

PDF

70.9 KB Created: 2021-03-13 17:53:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: a4d653e5cf5aa0b979d9086bf332a9ff SHA-1: 206c7ec6a1e5299aae1522af6dd3a8bf684eb59e SHA-256: 303613f4fb5d236016cb5c78fd210abb5fe208243f1c696122d897fde8f4153d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of external URIs and the 'make money online' lure in the document body suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/strik?utm_term=make+money+online+side+job PDF link annotation
    • https://wasefopepaseb.weebly.com/uploads/1/3/1/8/131856398/davivazu.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzufoxo/ijOhcih/prehistoric_fish_meme.pdfIn PDF document text
    • http://bilkaita.space/omnibus_budget_reconciliation_act_of_1981_mental_healthb7wr2.pdfIn PDF document text
    • https://bezuwodasufex.weebly.com/uploads/1/3/2/6/132696249/687415.pdfIn PDF document text
    • https://vigoruso.weebly.com/uploads/1/3/4/1/134131386/bc0101a9d2f.pdfIn PDF document text
    • http://idealicagocce.site/987956781231bk7c.pdfIn PDF document text
    • https://zubikazosiz.weebly.com/uploads/1/3/4/7/134761183/matepepapox_finulobov_gopizujutax_duximaj.pdfIn PDF document text
    • https://sogutujugaj.weebly.com/uploads/1/3/4/4/134403955/gedekadifibefetul.pdfIn PDF document text
    • http://sbrf.link/ganpati_bhajan_in_hindi452rp.pdfIn PDF document text
    • https://biwewonopegad.weebly.com/uploads/1/3/1/3/131380063/zivujukete_tamufunuw.pdfIn PDF document text
    • https://gemitipob.weebly.com/uploads/1/3/4/4/134474898/dupupeji.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/ieggeGq/btd_battles_mod_apk_6._8.pdfIn PDF document text
    • https://xutepokukofegik.weebly.com/uploads/1/3/5/3/135391302/madoginive-pipomimam.pdfIn PDF document text
    • https://minedikatew.weebly.com/uploads/1/3/0/7/130739540/babanuvu.pdfIn PDF document text
    • http://maliwalilaz.22web.org/structure_of_plant_virus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fakeloj.rf.gd/fesorikimawofawozadetojov.pdfIn PDF document text
    • http://dedamedasobime.epizy.com/a_christmas_carol_radio_play_script.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/58612670365.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/class_schedule_template_doc.pdfIn PDF document text
    • http://jebowozuguvufot.rf.gd/zojosigojub.pdfIn PDF document text
    • http://vakusidoler.epizy.com/tubuwizuzedo.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/batman_who_laughs_comic.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/90954098863.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_off0000d8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DA 5260 bytes
SHA-256: 6842b68242c0e08b626c1e8d850e3d2e729fe12ba7a8e486db9d6ca5e2e7f234
font_01_sfnt_off0000eac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC3 9980 bytes
SHA-256: b1c380c829f0d479891069b61bfe419a10dcb6e25fb8cfae4e5cf804648f3e3a

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