Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b0fffc0f9f04b3…

MALICIOUS

PDF

81.1 KB Created: 2021-03-12 20:57:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b6e600956bfaec4e84b7340dba2051d0 SHA-1: 546086fe7da51c27a224493b61058b1353867100 SHA-256: c7b0fffc0f9f04b3c5f2e99883fa84959919816dfc62a22f123a80ab2a27ad88
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 0.9992

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://jottigo.ru/wix?keyword=can+you+return+restaurant+gift+cards+to+target PDF link annotation
    • http://tularafujebok.iblogger.org/96549002308.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/how_to_renew_your_license_in_nc_online.pdfIn PDF document text
    • https://fagadixiridare.weebly.com/uploads/1/3/5/3/135304990/6804272.pdfIn PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/d87db34.pdfIn PDF document text
    • http://wovoradomumakil.medianewsonline.com/rofedozavunuzuginufumiki.pdfIn PDF document text
    • http://jisutuxoxaza.medianewsonline.com/nuferezajop.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/zefiluxavita.pdfIn PDF document text
    • https://guxanavos.weebly.com/uploads/1/3/4/2/134235011/sobiluvumubaw.pdfIn PDF document text
    • http://mawodusurixedu.iblogger.org/40919863923.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/mejamumufof.pdfIn PDF document text
    • http://geloritiveda.mygamesonline.org/83863699085.pdfIn PDF document text
    • http://peramen.22web.org/menoxazawamujiwuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rewuwuja.onlinewebshop.net/can_i_cancel_my_planet_fitness_membership_because_of_covid-19.pdfIn PDF document text
    • https://bc260b4e-efc2-469d-9102-9c7234992d76.filesusr.com/ugd/b1b3ad_c017f8bc4b3845588d07b177ff490c61.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e8579a4-2fce-4f5c-8bb2-d3128f76a6bc/cuisinart_ss-10c_review.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/where_is_the_reset_button_on_my_samsung_refrigerator_ice_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9d93276-c7ab-41a1-a96e-59693e0a8839/taliwunisivefusosamik.pdfIn PDF document text
    • http://jubogaju.atwebpages.com/375678519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e52fc1e3-9b24-4fd9-a0e7-ba39d8d6956c/17194122634.pdfIn PDF document text
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_60caeeee5a464c3985154df1380b57c2.pdf?index=trueIn PDF document text
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_3e86225b21f74d178ea16e25151f4f3f.pdf?index=trueIn PDF document text
    • http://tapeperogu.rf.gd/toyota_camry_2019_sport_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e164d0-ee68-45ee-b768-cf35c40a0514/dejipitufa.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_off00010155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10155 5164 bytes
SHA-256: 387133199ab493f3a3680b6c8edbde1d1a3d3f4c0e09e70b847cedf3a885fcff
font_01_sfnt_off000112fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FD 10652 bytes
SHA-256: 19da1085d295d6f024fe24f5e58ea71bccbedaff58dd2ee466c7ea3b5c71f287

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