Malicious PDF — malware analysis report

Static analysis result for SHA-256 044743e62f040750…

MALICIOUS

PDF

143.8 KB Created: 2021-03-29 02:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9760212bbf211004513fc55cf3b59426 SHA-1: bfc7e7b8bf60cbc67f926c41ca0bdfe0f97414d3 SHA-256: 044743e62f0407503064e00b9dc84edc7ea0a491a418c1c6b4de05e5dd92abdb
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with 'https://ponafet.ru/wix?keyword=atsuko+jackson+gif' being a prominent example. The presence of numerous external URIs points towards a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://ponafet.ru/wix?keyword=atsuko+jackson+gif
    • https://cdn.sqhk.co/voguzasijur/gjPmbno/carriage_house_printery_reviews.pdf
    • http://xasawidujilade.iblogger.org/rose_flower_border_template.pdf
    • https://cdn.sqhk.co/wogefosa/gjhb8Ba/best_blu-_ray_player_for_music_cds.pdf
    • https://cdn.sqhk.co/dajuzafum/gchbje6/kawaruzozili.pdf
    • https://cdn.sqhk.co/budatumibowu/4iSgdJv/3d_print_model_planets.pdf
    • https://cdn.sqhk.co/libuzewis/cKkgtR2/56463849153.pdf
    • http://jimefat.22web.org/rezipej.pdf
    • http://potaberukogox.66ghz.com/combined_operations_worksheets.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/voxazedisula/bahubali_tamil_movie_songs_ringtone.pdf
    • https://s3.amazonaws.com/tanikanaw/android_sdk_install_command_line.pdf
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_59583bf9c54f4ceea642e72502222b64.pdf?index=true
    • https://s3.amazonaws.com/nitizobuv/best_antivirus_and_malware_protection_for_android.pdf
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_fe332ccd21864a59ad500c099bc55001.pdf?index=true
    • https://s3.amazonaws.com/jivagajamav/19139249323.pdf
    • http://vokunewegulu.epizy.com/blenheim_high_school_sixth_form_open_evening.pdf
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_df3c3d091cf347958ba047066d82af73.pdf?index=true
    • https://s3.amazonaws.com/lowebemuwojiso/rokukunaloxoxaz.pdf
    • http://rokimaligevijep.rf.gd/36413756196.pdf
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_3e75bf71bb264e438df38d0077f0f39d.pdf?index=true
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_97437878b8ea48a886966c12ada94896.pdf?index=true
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_396a264825bc4d808b2ad2a218300015.pdf?index=true
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_072ee80d02bd4716a1a6109a08b335e2.pdf?index=true
    • https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_831052536f094e2aafe80776f2ee4994.pdf?index=true
    • https://s3.amazonaws.com/lupebesu/writing_ielts_answer_sheet.pdf
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_b86c3eeff38545d989350ecf429c80f3.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://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
stream_002_off00017030.bin
4ff83b5126a8de961fd31cd4f5bb9e57a804435c143b3fe5069c2f5e1f9b4969		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17030 37408 bytes
font_01_sfnt_off0001e162.bin
958e802a7b6cca4efc68b59b2a45e015397c5e1148afdd7c27808b0537a9fe31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E162 5048 bytes
font_02_sfnt_off0001f2b8.bin
34b8d434b8659e4e4788b69a5bb43ea9c1aa535c064e8ee640f7dca8565cf47c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F2B8 13528 bytes
font_03_sfnt_off00021bb3.bin
d25a34a56be33791b66bd7dbe91ee772b39b89bee75ba0e64ef3ea6cb2c10b57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21BB3 16260 bytes

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