Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29080da47969728…

MALICIOUS

PDF

81.2 KB Created: 2021-03-19 09:22:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3de0d8f1b39bf83dcbdbdb6181ae0e7 SHA-1: 250e18ed35212a0b429cfdc3cce7999130383008 SHA-256: e29080da4796972854a5769042a5451902c6a81611aa21ac2b57c96beb913b39
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/'. This indicates the document's primary purpose is to redirect users to potentially harmful websites. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious links and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/123?utm_term=chrome+portable+zip+file
    • http://wifunagidoli.mypressonline.com/what_to_eat_at_taco_bell_on_weight_watchers.pdf
    • http://afracheat5.xyz/56399365753l2odp.pdf
    • http://topsalon.xyz/jeposoliwabesokulalavakogdw2hp.pdf
    • http://fuzinitadovas.22web.org/edits_freeware.pdf
    • http://dedaruk.scienceontheweb.net/80705312161.pdf
    • http://towonededuv.medianewsonline.com/livro_clara_dos_anjos_lima_barreto.pdf
    • http://samaraexpo.com/85035550191atelu.pdf
    • http://papotanepif.22web.org/blocs_income_guidelines.pdf
    • http://kojazunupetip.mygamesonline.org/beneficios_del_aceite_de_aguacate.pdf
    • http://ganoget.scienceontheweb.net/what_is_application_software_and_system_software.pdf
    • http://xokezuwadem.mygamesonline.org/monomaburonodolixofiro.pdf
    • http://veronaital.space/exponential_and_logarithmic_equations_answer_keyofk7o.pdf
    • http://csxmoney.info/koxoritut6kbzj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/35300f95-8e09-4010-beb1-7b32251875d2/ge_universal_remote_code_list_for_insignia_tv.pdf
    • https://uploads.strikinglycdn.com/files/6402516e-39fb-487a-8f5a-417042bbbde2/applied_numerical_analysis_using_matlab_fausett_download.pdf
    • http://xobibaga.myartsonline.com/tijojumowakegixotaru.pdf
    • https://uploads.strikinglycdn.com/files/d446b6a4-ba7d-44c3-9d79-8dd91ce6dc7e/72488983399.pdf
    • https://uploads.strikinglycdn.com/files/b788909e-2e1b-4cd5-9656-b5589d46cbe4/98379091571.pdf
    • http://jorelodifi.rf.gd/6153086060.pdf
    • https://uploads.strikinglycdn.com/files/152bdb40-d233-455e-b62b-7afe5efbb8c7/how_many_sweet_potatoes_in_one_pound.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5fe.bin
1d9a8928fae9a7f88cb8e04556a1025ec57319c13bd4664bf8d871d1cc0aa688		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FE 4860 bytes
font_01_sfnt_off0000f688.bin
a6e0de8261dd72273e8949baca34baf4266186b789fb1262a1c9f5b60338b565		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF688 21728 bytes
font_02_sfnt_off00012802.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12802 4324 bytes

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