Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be1ebac2e650cb2…

MALICIOUS

PDF

104.4 KB Created: 2021-03-11 18:07:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 32c0d516fe7218ddbe13634bce537bbd SHA-1: eed61787fc29ae53f9ca47a31512a0550bae1db7 SHA-256: 9be1ebac2e650cb2b866c435738539109d374e532ed1d781974bcba191329b93
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to suspicious domains, with one specifically identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of numerous links and the heuristic firings suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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.
  • 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.
  • 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://dafemum.ru/award?keyword=bpsk+modulation+and+demodulation+pdf In PDF document text
    • https://poxawakepuk.weebly.com/uploads/1/3/1/6/131606289/2964509.pdfIn PDF document text
    • http://moitender.org/adosphere_4_esogfsir.pdfIn PDF document text
    • https://ludopugadataz.weebly.com/uploads/1/3/4/7/134709803/rivizux.pdfIn PDF document text
    • https://nitetawowi.weebly.com/uploads/1/3/5/3/135301411/501f31f.pdfIn PDF document text
    • http://bestrongbyg.com/fafuwexinexozahvk3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_602b5ef46e286.pdfIn PDF document text
    • http://komarovskii.xyz/human_biology_questions_and_answerszsvw7.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/ehx_attack_decay_manual8mscq.pdfIn PDF document text
    • https://tizidebiwefixim.weebly.com/uploads/1/3/0/7/130739379/gutixegix.pdfIn PDF document text
    • http://datab.vip/annabel_lee_summaryzc4vq.pdfIn PDF document text
    • https://vaturelola.weebly.com/uploads/1/3/4/7/134704713/tiduramutemifus_dakubitubasojax_wivawalo.pdfIn PDF document text
    • http://ig-copyrightnotice.com/comment_fusionner_plusieur_fichiertxhps.pdfIn PDF document text
    • http://slmit.fun/skip_counting_by_25_worksheetspkp7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403936/normal_5feba2fc9c0b2.pdfIn PDF document text
    • http://uplrezina.site/6111511125f737g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387046/normal_60011fc9a83cf.pdfIn PDF document text
    • http://zubiki.top/74599815103ndfea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381766/normal_6027b268c7fc1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wolawatin/wifoxazenidax.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/parrot_mini_drone_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/panasonic_dmr-es46v_remote.pdfIn PDF document text
    • http://mewarur.rf.gd/solovajodugiwifaturesovi.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/dispute_your_credit_report_online.pdfIn PDF document text
    • http://fotolen.epizy.com/wusavexegikoxibez.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/15720484927.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001440f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1440F 5204 bytes
SHA-256: b4ef32a08a027a35a3b1e3e204e1045196180b100bda6e2106cd961056a57d38
font_01_sfnt_off000155b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155B5 11392 bytes
SHA-256: b8ed39df9f6d17704dc8d57381a7e7751df45fb43ab473b45e12b8e5f8d8736f
font_02_sfnt_off00017cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CFB 16624 bytes
SHA-256: 988738a32db19836ef9ea8e6e1c697e6ea3ba4f88d8d40762d1426f7d533ece0