Malicious PDF — malware analysis report

Static analysis result for SHA-256 2912b396eceee1b3…

MALICIOUS

PDF

87.0 KB Created: 2021-03-01 00:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 1dc6aeafe17ad2a4e666698e8e539360 SHA-1: 90e2fb5fdc1e6c3a44b17f69bed753b4767b3cbc SHA-256: 2912b396eceee1b356483ff08ed573dab5757b6ee0c5adde95466e390cfc13a3
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains and redirectors, indicating a link farm or phishing attempt. Heuristics confirm the presence of malicious redirector links and a link farm on disposable hosting. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://dafemum.ru/123?utm_term=how+to+open+lux+1500+thermostat In PDF document text
    • http://vitofemegawe.getenjoyment.net/474549029.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/jjDnieA/live_video_call_app_without_money.pdfIn PDF document text
    • https://cdn.sqhk.co/fubemabofof/jbMgd9h/directv_guide_button_not_working.pdfIn PDF document text
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/neronagenedexef-jexupimiti-jeratefexete.pdfIn PDF document text
    • http://newidowakev.22web.org/2591664263.pdfIn PDF document text
    • https://cdn.sqhk.co/fematixub/dLJ4ijN/zoxinutanuvabusexevapanib.pdfIn PDF document text
    • http://myyshooop227.site/maze_machina_gameh5bnf.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/UThipWM/ea_sports_fifa_21_companion.pdfIn PDF document text
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/zoxupobekiv.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/how_computers_work_book_reddit.pdfIn PDF document text
    • http://vknacruckalaikov123.xyz/space_marshals_apk_free_downloadwfk82.pdfIn PDF document text
    • http://creamwalls.online/being_mary_jane_quotest1o6i.pdfIn PDF document text
    • https://cdn.sqhk.co/bujomuvi/hejhP3W/wallpapers_for_phones_cool.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/75360805175.pdfIn PDF document text
    • http://lologunaw.mygamesonline.org/wididovigejedaf.pdfIn PDF document text
    • https://zutofamofiselas.weebly.com/uploads/1/3/4/0/134040676/8258903.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvesanap/hohcjeG/lekaka.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/higidhf/download_game_boboiboy_galaxy_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://padijajuvon.rf.gd/bunawiferisemunemurolu.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_off00011539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11539 5500 bytes
SHA-256: 2611e2e9407981de070d308a203f1329740adacf9bc68fc05be718f6622db35a
font_01_sfnt_off000127da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DA 10932 bytes
SHA-256: 027e274cf08afc69e0663c0068c473f80e435a74c16cfe6662942fd971f82619

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