Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bf32b0c01cd7ea7…

MALICIOUS

PDF

75.3 KB Created: 2021-03-22 13:54:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f9125e95bb3d1acab112a2568aad7b46 SHA-1: 7018be71f06f58a1c706a95f9785d120395319b9 SHA-256: 0bf32b0c01cd7ea7865adc9094e594d52f2f6f5fe3bfc7a0d4ba6ce008a69bdf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://fokemale.ru/wix?keyword=rainbow+volume+lab+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382771/normal_6007288931fb3.pdfIn PDF document text
    • http://jibakerutev.mypressonline.com/wishful_drinking_carrie_fisher_full.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488090/normal_603c83dc56539.pdfIn PDF document text
    • http://volalagokiva.sportsontheweb.net/microsoft_office_access_2007_tutorial_bangla.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370768/normal_5fec3dfe362e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417813/normal_600c0156b70e4.pdfIn PDF document text
    • http://ductsunlimitedins.com/catch_me_if_you_can_netflix_reviewk9hpn.pdfIn PDF document text
    • http://bikomowaxibujoj.medianewsonline.com/fundamentals_of_astrodynamics_roger_r_bate.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/which_cordless_shark_vacuum_is_best.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/saluda.pdfIn PDF document text
    • http://brumbum2.xyz/bulsu_entrance_exam_reviewerzn5zi.pdfIn PDF document text
    • http://ravevuzovije.mywebcommunity.org/21701283753.pdfIn PDF document text
    • http://wacc-cat.org/how_do_you_treat_arthritis_of_the_neckokrgk.pdfIn PDF document text
    • http://jeseselanus.scienceontheweb.net/synco_baradit.pdfIn PDF document text
    • http://topsol.xyz/difficult_origami_instructionsbdudk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zukogi/tuxudaburuvikewogorupare.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/87209975639.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/thinner_leaner_stronger_calorie_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/tuzasozi.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/22934206665.pdfIn PDF document text
    • http://kesolimasakifi.myartsonline.com/asus_rt-n66u_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/dulemagovow.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDC 4932 bytes
SHA-256: 0d1d4e1860188f9ef9e124efec3cd72ef4a1d537ac531110b694c20a7462a274
font_01_sfnt_off0000ed92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED92 10660 bytes
SHA-256: ee7f4034daf5e6065e256338ed3d6ccc620b3607e9127691b3617f7dbe52bac2
font_02_sfnt_off000111e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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