Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3900d10467f945…

MALICIOUS

PDF

75.6 KB Created: 2021-05-15 14:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0974a8c0455ed89d5cada5a7cb104dbd SHA-1: 98bf95121a40caf9abec1500579cb8cfdd6a87f6 SHA-256: 9f3900d10467f94594fb48197f782cfcdb0487b22fe7b06be8b21cd08b6b8f16
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 0.9996

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://vilenefex.ru/strik?utm_term=is+it+bad+feng+shui+to+have+bed+facing+window PDF link annotation
    • https://wetenonuvodipu.weebly.com/uploads/1/3/5/3/135321676/mubevomepifomefeje.pdfIn PDF document text
    • http://wonuwomola.iblogger.org/what_reading_level_is_a_little_princess.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485014/normal_60125983a36e2.pdfIn PDF document text
    • http://a1metromovers.com/779194586hink7.pdfIn PDF document text
    • http://hookup666.site/677718149979mfqs.pdfIn PDF document text
    • https://kesevure.weebly.com/uploads/1/3/4/4/134497963/84477aac412c.pdfIn PDF document text
    • http://look-hotel.com/rozowewananobujoluulb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411931/normal_5fda4b9480254.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422147/normal_5ff0c35ebe2bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_601be0b860663.pdfIn PDF document text
    • http://magowowir.iblogger.org/wiseximuvupudomiruga.pdfIn PDF document text
    • http://badgesverified.com/basic_security_testing_with_kali_linux_1xc7cx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495531/normal_5ffad7b58d8b2.pdfIn PDF document text
    • https://piborubaladedos.weebly.com/uploads/1/3/4/7/134764427/1573463.pdfIn PDF document text
    • https://puxekubokoru.weebly.com/uploads/1/3/4/6/134683715/5606349.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bajivuselome.epizy.com/68732408228.pdfIn PDF document text
    • http://dalizavok.rf.gd/how_to_know_if_you_have_a_learning_disorder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a30cd316-493c-4b46-bed4-fb0a00ff1f9d/ryobi_battery_charger_both_lights_flashing.pdfIn PDF document text
    • http://kipirigup.rf.gd/bodabijaparanuropeduvoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0a86938-e8e3-4069-a8fe-d7b759450664/nolor.pdfIn PDF document text
    • http://gopudagob.epizy.com/small_business_answering_service_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b991a13c-5a96-4ed7-903d-8f785221dc17/are_wired_smoke_detectors_interchangeable.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_off0000e851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE851 5384 bytes
SHA-256: 1adb71670b0ca2f6cc44ab077db1b6b9602a3e08fa7ab58244c26484783aa67e
font_01_sfnt_off0000faba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABA 11092 bytes
SHA-256: b300ac2e3bfbcf5f36c703a317538dd53cde006761d51d30dff4683495437924

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