Malicious PDF — malware analysis report

Static analysis result for SHA-256 7619b7ab5194b4cd…

MALICIOUS

PDF

117.0 KB Created: 2021-05-17 06:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aed3dc6c2fd7fa41e2813c8eebcf4bd3 SHA-1: 6a3d216635832cc816961df05363d88c612ddc5d SHA-256: 7619b7ab5194b4cdc6decd0d3b37f4ed0c1541b78b26378640d3ffa400f00770
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it is a link farm, with one of the external URIs pointing to a URL that appears to be a phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URL is likely intended to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=how+long+to+activate+dish+receiver
    • https://tamukatiraf.weebly.com/uploads/1/3/4/7/134766395/zivanosojot.pdf
    • http://zekifafeter.scienceontheweb.net/xazubeguxaziwelejexa.pdf
    • https://ligapixoxos.weebly.com/uploads/1/3/4/3/134378271/3df9dfcc30da1df.pdf
    • http://xafopawiki.medianewsonline.com/comment_fusionner_des_windows_10.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/petikamov/baixar_whatsapp_2019_apk.pdf
    • https://s3.amazonaws.com/piwupevivotixi/ronase.pdf
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_00d3a77cb3e345dbb24884d9d49ed40e.pdf?index=true
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_7ca60187ceaf40e6a6216ab31c3effd4.pdf?index=true
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_5af26b99ed014de0ac5febfc62aff0f2.pdf?index=true
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_a9579a384fb243eea08a46947d21d128.pdf?index=true
    • https://s3.amazonaws.com/tazibabebamep/automatic_voltage_regulator_avr.pdf
    • http://biwosagamivi.myartsonline.com/maximum_ride_the_angel_experiment_read_online_free.pdf
    • https://uploads.strikinglycdn.com/files/ae872e26-860b-4893-a602-6a8253016956/towesuxuziguseke.pdf
    • https://uploads.strikinglycdn.com/files/e07614ea-964f-4327-9bd9-f9433c814c35/96752540475.pdf
    • https://e25b7b56-d8f7-44cb-9276-56428e53d1cc.filesusr.com/ugd/63f3e8_9a998923685e4f3fa8738e4b84941fc0.pdf?index=true
    • https://s3.amazonaws.com/kitakilesa/android_cardview_background_color_not_changing.pdf
    • http://xirexadugimog.atwebpages.com/how_do_i_reset_the_bluetooth_on_my_vizio_sound_bar.pdf
    • https://uploads.strikinglycdn.com/files/5f7ed6a5-6855-4b71-9ffc-ea707ec7482a/how_to_use_charcoal_pencils_for_shading.pdf
    • https://uploads.strikinglycdn.com/files/465cfc78-e64e-422d-a667-587605df67d6/15537161973.pdf
    • https://s3.amazonaws.com/luworizesupox/photo_song_whistle_ringtone.pdf
    • https://s3.amazonaws.com/fuzafuzeruwit/nutulafuwuta.pdf
    • https://s3.amazonaws.com/musokejixami/51533536587.pdf
    • https://s3.amazonaws.com/tubupejevomo/69476883012.pdf
    • https://s3.amazonaws.com/bibejovixapis/razagafetonorojabaluj.pdf
    • http://pupagerirawax.myartsonline.com/pathfinder_roleplaying_game_bestiary_2.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016634.bin
39f47a8a53cf6ea8ef4ce60e3466c7113ee71e3e236cbc1c5c67f5f3cf8e8504		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16634 5104 bytes
font_01_sfnt_off00017797.bin
ed3ce7edb70915410db3d1d05ddb77f7cbb32f611a1b231d5a8d864a4a311612		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17797 13076 bytes
font_02_sfnt_off0001a259.bin
99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A259 16060 bytes
font_03_sfnt_off0001b6f3.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6F3 4324 bytes

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