Malicious PDF — malware analysis report

Static analysis result for SHA-256 618cd3d92a1c4d27…

MALICIOUS

PDF

108.9 KB Created: 2021-03-23 03:29:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 899d5c92c96931456afbf75607532630 SHA-1: 61328deda9f7922fb29ecf994f4cc35b3ce46dd7 SHA-256: 618cd3d92a1c4d274d1b493215735a944a33b7c85c59313104ee4c72896f0078
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous external links, with one pointing to 'botokaw.ru', suggesting a phishing or malware distribution lure. The presence of embedded URLs and the 'PDF_SEO_LINK_FARM' heuristic indicate an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://botokaw.ru/123?utm_term=game+center+apple+sur+android
    • http://sakepugikunon.mypressonline.com/siklus_hidup_basidiomycota.pdf
    • http://ig-copyrightviolation.com/tipos_sistema_de_informacion_gerencialurfqf.pdf
    • http://opt05.ru/42687418041ligos.pdf
    • https://fogoranamixite.weebly.com/uploads/1/3/5/3/135390362/jemuvoki.pdf
    • https://mufewikusa.weebly.com/uploads/1/3/4/0/134042586/0d9f2d40d41fd.pdf
    • https://letunaxure.weebly.com/uploads/1/3/1/3/131383761/5907900.pdf
    • http://amaryllis.space/diablo_2_lod_downloadlyd09.pdf
    • https://vosojexurixug.weebly.com/uploads/1/3/1/0/131070535/d3f14b281.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/6901fc57-d372-46c7-bf8d-2c8df92bef3d/442374516.pdf
    • https://s3.amazonaws.com/doxifuba/jisoluwawiwejukugam.pdf
    • https://s3.amazonaws.com/kijelopazekune/engadget_gift_guide_2018.pdf
    • https://uploads.strikinglycdn.com/files/3275ebe7-3875-4b95-a285-f990f53257c6/singer_heavy_duty_sewing_machine_4411_manual.pdf
    • https://uploads.strikinglycdn.com/files/845dc3e1-7ce1-4e36-af66-43d327813efb/love_yourself_lyrics_justin_bieber.pdf
    • https://uploads.strikinglycdn.com/files/906e9541-350a-42a5-b7ec-73278f8f69cd/esv_study_bible_leather_indexed.pdf
    • http://vekisofekibote.myartsonline.com/ledapizo.pdf
    • https://uploads.strikinglycdn.com/files/7bdbc8b9-777a-49a5-9b8d-07dc945215a8/87207585737.pdf
    • https://s3.amazonaws.com/sefipa/kung_fu_hustle_english_dub_stream.pdf
    • https://s3.amazonaws.com/rodiligarexo/how_to_pair_alpine_bluetooth.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000130bf.bin
ff6d9d7a4b0d497e3009a2b7ea87e39c41dfdc847ff1612493f741f8345b99a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130BF 3548 bytes
font_01_sfnt_off00013d85.bin
20129b7f849674ceaae77d574a17bccab6de2861b52cf26b2b43e9f179d7d7b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D85 5132 bytes
font_02_sfnt_off00014edd.bin
6978e4bf6ea9621c9bf36f05754cac5749b03ac4ea100422f28ad2d102cfcc91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14EDD 15956 bytes
font_03_sfnt_off000180ff.bin
5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x180FF 16060 bytes
font_04_sfnt_off00019597.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19597 4324 bytes

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