Malicious PDF — malware analysis report

Static analysis result for SHA-256 d79f1a7bbdb55b51…

MALICIOUS

PDF

95.6 KB Created: 2021-03-21 04:16:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1396d085b797a087e84a847519778202 SHA-1: b6ef773318056fdfa82138c4ae0b48299eddf968 SHA-256: d79f1a7bbdb55b51353901523ef5f5cbd1e7f1f3fcd557e269b30862477b1b9b
204 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many of which are SEO-optimized and redirect to potentially malicious sites, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK heuristics. The primary malicious URL identified is https://ponafet.ru/123?utm_term=businessman+3+movie++mp4, which is presented as a lure for a movie download. The ML classifier and ClamAV detection strongly support the malicious verdict, suggesting this is a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/123?utm_term=businessman+3+movie++mp4 PDF link annotation
    • http://zabemaladameg.medianewsonline.com/1623650781.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/what_is_nikes_strategy.pdfIn PDF document text
    • https://nezasofesaz.weebly.com/uploads/1/3/5/9/135961661/vepiwoxobu_wodeb.pdfIn PDF document text
    • https://lakozudixe.weebly.com/uploads/1/3/4/7/134704846/tasuwilodosavi-wavelexit.pdfIn PDF document text
    • https://ziresaro.weebly.com/uploads/1/3/4/5/134509830/9659467.pdfIn PDF document text
    • https://tizatikunokoxul.weebly.com/uploads/1/3/1/0/131070767/b345ec5a830.pdfIn PDF document text
    • https://loxugajasogilo.weebly.com/uploads/1/3/4/4/134476701/lumutojub-tafafuxewawibe-texonememefa.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/pack_n_play_bassinet_assembly.pdfIn PDF document text
    • https://xaviguvugunaji.weebly.com/uploads/1/3/5/3/135313722/watulen.pdfIn PDF document text
    • https://fakilopatezi.weebly.com/uploads/1/3/1/6/131606638/ruregesok-rinazigilele.pdfIn PDF document text
    • http://memowelubi.mygamesonline.org/coach_black_quilted_camera_bag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/f40a7dfd-1d77-4ba6-a794-e1474d55c438/ridgid_planer_blades_tp13002.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/escape_from_alcatraz_movie_hd.pdfIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_5549904c22a44a9897a4f5cae09f92dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/adobe_flash_player_10._1_for_ps3.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/kiss_the_rain_piano_sheet_music_easy.pdfIn PDF document text
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_380103c7b33c47738a23bb9ab89f18fa.pdf?index=trueIn PDF document text
    • https://12c9c681-cafc-4f88-93da-cb6f471fd49a.filesusr.com/ugd/f09a9d_59ce2c0c913748fd8528b5cd4bba3cb3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/azure_service_bus_explorer.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/32769385836.pdfIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_8aa31b1ba78546ea990d2d56bb37afe4.pdf?index=trueIn PDF document text
    • https://855e1e5b-0daf-4dce-aa73-dfad2bfec5df.filesusr.com/ugd/ced2dc_e074db7387aa42f2bde0be991ae2477d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7351ed60-beed-4c7b-97d2-a88119265c9f/wotujufunotodikivajikivan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e6809f-72bb-4b97-a146-fe760b839621/dowuka.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C1 5196 bytes
SHA-256: fcb83605d1f86dd8de1e2e5938226be2291080befc50f01a7406bb16be065dd9
font_01_sfnt_off00012569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12569 3796 bytes
SHA-256: 07d5a63f08801e8335ffae76026ab15444325137f1c4a518cdc2420be340e853
font_02_sfnt_off00013362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13362 11484 bytes
SHA-256: e35f46d5f92375eb9be5882cd6b240e9267392a1ae6c214e0c7b3f07c67fda63
font_03_sfnt_off00015a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A3B 16504 bytes
SHA-256: 5e9104d1882c42b1ba7c5dfd533c554522d36eae698f131cdd1f307b412a6704