Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abc7107d0ccbab8…

MALICIOUS

PDF

67.1 KB Created: 2021-03-30 17:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 958bd30a943a79408301479a89105f2e SHA-1: 5dab2f2cbb07fe06eecf419b5775895020f48480 SHA-256: 8abc7107d0ccbab898825c566355f27c08418bf7682cd4a1572a75b41b1564d2
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

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://xezojetit.ru/123?utm_term=chala+jaaunga+aashiqui+3+song++pagalworld PDF link annotation
    • http://kowesaxulenim.22web.org/woruniliwezinijupubu.pdfIn PDF document text
    • http://vidoxilaxugak.22web.org/how_to_bait_a_swarm_trap.pdfIn PDF document text
    • http://xumosigebazu.iblogger.org/battery_saver_apk_free_full_version.pdfIn PDF document text
    • http://digitalcalakk1.xyz/what_is_a_metaphor_for_weatherkx03t.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/sofejukod.pdfIn PDF document text
    • http://rigipufefe.iblogger.org/boost_mobile_lg_android_phones.pdfIn PDF document text
    • http://teagreen.space/pattern_fish_book7jo5q.pdfIn PDF document text
    • http://azakalaza3.xyz/40587268581t0hz0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_a426c25381864e16944900128fbba0f4.pdf?index=trueIn PDF document text
    • http://kijilari.epizy.com/xepageloxuj.pdfIn PDF document text
    • http://koradanizepagow.myartsonline.com/xemabujanus.pdfIn PDF document text
    • http://foxivowopejo.rf.gd/assessing_speaking_skills.pdfIn PDF document text
    • http://kovewufawik.rf.gd/mergers_and_acquisitions_definition.pdfIn PDF document text
    • http://fogaduvese.epizy.com/interior_design_jobs_frederick_md.pdfIn PDF document text
    • https://a1f0096d-76f5-425c-b826-5ccbd312c1bc.filesusr.com/ugd/8f8c07_e105ca5ec1894a16b994486f6c6dd491.pdf?index=trueIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_571ca6269872417f937e3678eadb8ac8.pdf?index=trueIn PDF document text
    • http://nozoxujurasota.epizy.com/70507634632.pdfIn PDF document text
    • http://monovopo.rf.gd/36607798818.pdfIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_dd630295ffbc4dd0a92c6de5a33f5246.pdf?index=trueIn PDF document text
    • http://binalidagu.epizy.com/45772857330.pdfIn PDF document text
    • https://0443db59-9f9d-4031-b786-8a5723798135.filesusr.com/ugd/ab62d6_188ec846bb12454eafc7fc494bb7224f.pdf?index=trueIn 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_off0000c935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC935 5584 bytes
SHA-256: e3071c392aae65c006a01cc1af1480fc134c3de1ee2d704da69f601822f7686a
font_01_sfnt_off0000dc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC37 10172 bytes
SHA-256: f948f9e3e7b5012d2911cbb135f6b642a01ad4e72b21c5540f300318d38f88d2

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