Malicious PDF — malware analysis report

Static analysis result for SHA-256 886dcb3c34cc70e7…

MALICIOUS

PDF

85.0 KB Created: 2021-03-18 22:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93d75da532a12c52e09eed27a200e1e5 SHA-1: 6b7a5b93d85ba2123a3419c55feae519ab1f4256 SHA-256: 886dcb3c34cc70e72ab198c370f10b9146a87e880fef05bb0e68d778c74467c4
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan distribution attempt. The document body and extracted URLs suggest a lure related to song lyrics or game downloads, designed to trick users into accessing a network of linked PDFs, likely for malware delivery. The presence of numerous external links, including a link farm, points towards a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://vilenefex.ru/award?keyword=alan+walker+alone+lyrics+pdf+download
    • http://seomagnat1.online/sinozidomoguzfuboc.pdf
    • http://lnstagramcopyrigtservice.com/453774177343pche.pdf
    • https://cdn.sqhk.co/xutazazo/mifui4c/crossy_road_game_download_for_android.pdf
    • http://naturebiolog.fun/puxajaxu3km.pdf
    • http://aydym.club/analysis_school_performance_loginh712q.pdf
    • http://tk-time.site/mushtaq_biochemistry_vol_1x35sh.pdf
    • https://cdn.sqhk.co/remudejifi/jffael3/96395402360.pdf
    • https://cdn.sqhk.co/kuzaxepigi/hhajh1U/jaxajogemunopefifegomo.pdf
    • https://cdn.sqhk.co/zoluxoni/yjgkhi6/best_funny_videos_ever_in_the_world.pdf
    • http://lotto-investclub.com/what_is_the_trichromatic_color_theory8s66k.pdf
    • http://repair-kvadrokopterov.ru/587958499639a1k2.pdf
    • http://drilltech.info/pawewagabupivitowamai9o33.pdf
    • http://kismykeitio.best/csgo_copy_pasta7fd5h.pdf
    • https://cdn.sqhk.co/xipapotug/ciijmja/66299130973.pdf
    • https://cdn.sqhk.co/papusabefo/ggghjel/53239303716.pdf
    • https://cdn.sqhk.co/monasomeb/QPfjbgg/install_platform_toolset_v141_visual_studio_2015.pdf
    • http://timurberg.ru/zetixevizuxogeja9sadr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_b3c5ac7369b84c928929e854f545e7e9.pdf?index=true
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_8af83fb5bf53487dbe8d48dc37622844.pdf?index=true
    • https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_9958d292682946e0b40680f1fe112d9d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eb657a6d-5aed-45ca-889c-1b1f1358e927/clair_de_lune_ukulele_tutorial.pdf
    • https://uploads.strikinglycdn.com/files/2ad4239b-2f7c-440c-b4db-0845d0f354a0/22419166075.pdf
    • https://uploads.strikinglycdn.com/files/0193ec3d-d965-4175-bb04-f5b9c8de7aff/48638204164.pdf
    • https://uploads.strikinglycdn.com/files/f2035d2a-c725-4718-8047-cfc007285734/55817643860.pdf
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_917bc64f91f74c1bbcbf7e8cf964c750.pdf?index=true
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000111cc.bin
49cfa1b7f75981e353f0c77c0316adf440492865feafd9cc89d0a1604443b173		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x111CC 21044 bytes
font_00_sfnt_off0000dc60.bin
4c5618b584c88fe5c9f4aa5cfbc4fa4a9f1c2fb53b35309c389e5fd52cd357c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC60 5104 bytes
font_01_sfnt_off0000edd4.bin
0170548eaac434d48676dc542f64b96c8f717e32e4e525381f4b71bf8e6bccba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD4 10456 bytes
font_03_sfnt_off00013510.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13510 4324 bytes

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