Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd39d018293ed50c…

MALICIOUS

PDF

90.0 KB Created: 2021-03-11 08:00:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e031b257d01a87726c9542f17d1adf26 SHA-1: afee69b31005bb2cfdb1cfbff73e3b609f1ed6ad SHA-256: dd39d018293ed50ce1696b89c40727e4210cd75c27a285d395c0786f25b62ad7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm or phishing lure. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent. The presence of embedded URLs and the ClamAV detection further support this, pointing towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/strik?utm_term=osprey+publishing+books+pdf PDF link annotation
    • http://tryici.xyz/java_api_tutorial_for_beginnersn2ov6.pdfIn PDF document text
    • https://cdn.sqhk.co/laxepinam/idCiiha/android_emulator_cleartext_http_traffic_not_permitted.pdfIn PDF document text
    • http://topcabinets.xyz/18076268232p8j4j.pdfIn PDF document text
    • http://pijevovonojatev.iblogger.org/hssc_clerk_admit_card_2016_link.pdfIn PDF document text
    • http://byseles.xyz/68700322002vq313.pdfIn PDF document text
    • https://cdn.sqhk.co/mezigiduze/4jiZiia/memejorikuxiku.pdfIn PDF document text
    • https://xuvifadeto.weebly.com/uploads/1/3/2/6/132682806/cd4be05309bf1.pdfIn PDF document text
    • https://zikotidule.weebly.com/uploads/1/3/4/6/134604350/xulugowi.pdfIn PDF document text
    • https://jazujopu.weebly.com/uploads/1/3/0/8/130873842/3726429.pdfIn PDF document text
    • https://sozuleku.weebly.com/uploads/1/3/5/9/135962343/nululenizizus.pdfIn PDF document text
    • http://vorecan.fun/fijewujobabuvaruxijip92ggm.pdfIn PDF document text
    • http://labiosdewonda.com/sowukutinadotejew8f8pl.pdfIn PDF document text
    • https://dubibezu.weebly.com/uploads/1/3/1/4/131453247/visotez_rawurugeda_xinufaz.pdfIn PDF document text
    • https://cdn.sqhk.co/rogevuzazi/Fiejbhf/kejomipimoda.pdfIn PDF document text
    • http://xemepuvaxeliv.iblogger.org/befumilidalewe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dc30697-9b7b-4c1a-a629-4b8856404b9d/kowaxivuzuvumizumuriwazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca6c9fe-efd9-4f9d-8fe5-1e03f18ed644/big_fish_audio_and_vip_loops_-_swagg.pdfIn PDF document text
    • https://bae73f5a-7881-4275-ad8d-fa096fb8bca6.filesusr.com/ugd/8b97dd_60395baed6964e0eb9ef63785deb956e.pdf?index=trueIn PDF document text
    • http://zisigogemewuju.epizy.com/esv_journaling_bible_large_print_leather.pdfIn PDF document text
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_b2c8247732994bfa8636f097ac9b00f3.pdf?index=trueIn PDF document text
    • http://kukadafimi.rf.gd/naruto_shippuden_senki_2._0_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63d25f9c-4018-40f7-9efa-c48caf467bbd/57708930376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5b78ebb-a236-48a1-91c0-1c52742b7f36/generac_gp3300_home_depot.pdfIn PDF document text
    • http://buzuxujov.epizy.com/78607821421.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_off00011ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFA 5424 bytes
SHA-256: bd198953156b352aebc132834a324bf156d89ee0d2f18b82ee9548e65e0e6005
font_01_sfnt_off00013265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13265 12020 bytes
SHA-256: e35c1b38c5dac4f4dbde6ad613edb08f16d18e9920b3b94366a7b6cbce3b156a

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