Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe57d1379ccd2c7…

MALICIOUS

PDF

69.1 KB Created: 2021-03-25 00:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 757b68c5465f2d59ba6aff7d09982336 SHA-1: 8ccd317e1c067308eba8193af360b828788f7dcc SHA-256: 2fe57d1379ccd2c71df70a981d2cd3dc1c593813c5b1ca0de2d548f4005e8849
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://bologen.ru/wix?keyword=the+pact+answers PDF link annotation
    • http://pifanaliriwabo.mygamesonline.org/pikesiwudavef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484115/normal_604cc8d1cec2e.pdfIn PDF document text
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/pivolad_zozasubegudibu_pubutoxol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446155/normal_60167783369ba.pdfIn PDF document text
    • http://najisemure.medianewsonline.com/notitarekafumifun.pdfIn PDF document text
    • https://ramexolilaburav.weebly.com/uploads/1/3/4/3/134331107/vizezedoxipo.pdfIn PDF document text
    • http://vodizurulenega.mypressonline.com/why_was_the_game_show_the_chase_cancelled.pdfIn PDF document text
    • http://kamefutebiwef.mywebcommunity.org/zadopimit.pdfIn PDF document text
    • https://gozexorajive.weebly.com/uploads/1/3/4/6/134610068/2524973.pdfIn PDF document text
    • https://nogurutofuxuj.weebly.com/uploads/1/3/4/5/134525281/nosiguvamof-xujel-mawazojawe-rivovu.pdfIn PDF document text
    • https://bewotababuruga.weebly.com/uploads/1/3/1/1/131163836/8716021.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485173/normal_5fced1d51b2a3.pdfIn PDF document text
    • http://silekutum.medianewsonline.com/cules_son_los_beneficios_de_participar_en_un_programa_de_ejercicios.pdfIn PDF document text
    • http://lisuzigerob.mygamesonline.org/wokumososogerobuwazodi.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/wikurixobelu/how_to_connect_sennheiser_wireless_headset.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/best_beard_trimming_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/esv_study_bible_personal_size_trutone_imitation_leather_brown.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/25336948271.pdfIn PDF document text
    • http://rodedewezijore.atwebpages.com/83576186042.pdfIn PDF document text
    • http://kavezusi.onlinewebshop.net/99974056185.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/strongs_concordance_kjv_free_download.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_off0000d21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21E 5028 bytes
SHA-256: 6146fdaadf16cbd2275e511c8a3e1346d012d8c0453156cdabfc58b38dfaceb5
font_01_sfnt_off0000e343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE343 10488 bytes
SHA-256: e7deeea1cefd5554427e5afe95fe3f1593d6bd3930d2ef45d692b3aab7362b2c

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