Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaecfaeaca5c1912…

MALICIOUS

PDF

78.0 KB Created: 2021-03-23 13:27:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 534b692a278b6989bbca895747caf98d SHA-1: d804450c164438fc7a43d23c72076fd5f5b44909 SHA-256: eaecfaeaca5c19129501d29b75482d4591ecd51b26e40ae841261d4ca1c7f3e4
126 Risk Score

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=jatavia+johnson+facebook PDF link annotation
    • https://cdn.sqhk.co/lepavenujal/oiNc5hf/91470311882.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/historia_secreta_de_chile_de_jorge_baradit.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/ggbXGzf/little_foxes_movie_jodie_foster.pdfIn PDF document text
    • https://cdn.sqhk.co/tuvameboroke/hiUgfmA/escape_the_prison_game_cheats.pdfIn PDF document text
    • http://moradudipomibo.mypressonline.com/dental_management_of_thyroid_disorders.pdfIn PDF document text
    • http://vclean-sale.shop/candy_crush_2019_apkutrbh.pdfIn PDF document text
    • http://petersikdar.com/678912831564nccr.pdfIn PDF document text
    • https://cdn.sqhk.co/rolidofajug/jeKqsgc/52829277166.pdfIn PDF document text
    • http://wubujonil.getenjoyment.net/galinufibiron.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_756ed23785bc46a6b831144c84e51a7f.pdf?index=trueIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_ca3fb82fd7ec43d1b8f49145b825a137.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gateme/flight_of_the_bumblebee_clarinet_solo.pdfIn PDF document text
    • https://506dbbd1-d4b3-44b1-a4c9-6b5d0cab6a23.filesusr.com/ugd/c75f60_7d161f5f0e39448b834ab6b29de4712f.pdf?index=trueIn PDF document text
    • http://kopolug.myartsonline.com/cambridge_igcse_computer_science_download.pdfIn PDF document text
    • http://lipabarud.atwebpages.com/jspdf_word_wrap.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/changing_to_word_format.pdfIn PDF document text
    • http://wepikupovug.myartsonline.com/fusojone.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/rilefamevanotodoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/formulierungen_englisch_abitur.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/is_vizio_reliable.pdfIn PDF document text
    • https://58f604bd-1fd8-4cfe-af9b-f15e67d030d5.filesusr.com/ugd/9a7439_37559402a01f4158b4477394f2af786f.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C2 5168 bytes
SHA-256: d1db3b554055ba5dd634cd8d341bc92cf34b6bc8c710fe9f28c13bc81374aeed
font_01_sfnt_off0000e972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE972 11476 bytes
SHA-256: c78c7f06e1ff3a0b711d706fd3227f888d6b39b5d0d90911e6d523f4296f7fef
font_02_sfnt_off000110b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B1 16996 bytes
SHA-256: 2944e41a144475a44b985b46d93e058f3790dc75f54c5d3e4b12f9d12b23efcd

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