Malicious PDF — malware analysis report

Static analysis result for SHA-256 543960f8927ba8bf…

MALICIOUS

PDF

93.4 KB Created: 2021-03-24 11:18:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 335c2a4ecd08bbdfc150cfa86459af10 SHA-1: 26f294fe6342948215af9e6fd53f17a22211c397 SHA-256: 543960f8927ba8bf8e2dde2902a4b9e85b7a3330a3870cad54d05a72fb35f105
164 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, as malicious and potentially a phishing or trojan. The presence of a large number of external links, including one to 'gimoguvi.ru', suggests a link farm or redirection to a malicious site. The 'SE_DOWNLOAD_BUTTON' heuristic indicates a lure to trick the user into clicking, which is consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://gimoguvi.ru/123?utm_term=afara+e+frig+song++djpunjab PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465149/normal_6059ce7b64e94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449392/normal_602ab68e814e0.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://3315be42-5dab-4b6e-b44d-105cb490973e.filesusr.com/ugd/2e3488_fd802bf62e14460c9e89c8dc45d4f10f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/28555153393.pdfIn PDF document text
    • https://53002a68-e35f-4167-ac88-1ab9777d7e72.filesusr.com/ugd/f5bc2a_3c120e42f3144b868ffb79b1fdf8ad11.pdf?index=trueIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_bf426a86a91f469b96f7f499a931ed10.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/65584781-bbe1-44c8-b6fc-f443e8b244a9/72383761512.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/game_baldi_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/173260ec-994c-467b-9b6b-ee2cf19324bb/bekef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e537abec-2445-4e5d-8aea-969cade2f4de/quiq_hf_pfc_battery_charger_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ce993f-e206-4b92-ad6e-f78b5fc270db/how_to_read_the_f_table_in_statistics.pdfIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_05d64f59e0274c2d90d6afa25964ccf3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/98668918950.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/how_much_is_the_xbox_one_on_black_friday.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecfc1c5d-0150-4def-93a3-1bbf28604f3e/9890392509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff463293-0777-4ac6-bec0-76c7283ab0b6/gofufazutiduxefikitolar.pdfIn PDF document text
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_c834a98e3e03495981091c0f0ed0c295.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/polk_magnifi_soundbar_power_cord.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/fasawepevegilisapuwifos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af186e7c-1ad5-468b-9734-7ce6e26f83ce/shepherd_the_flock_of_god_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/sufodurivipe.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/how_to_calculate_how_many_molecules_are_in_a_compound.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF226 5380 bytes
SHA-256: f7d85b22c63b53fb0f3cc3f15655381fbebc02bc06b1bd28dc2803294bdfb7e7
font_01_sfnt_off0001047d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047D 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00010fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD8 4532 bytes
SHA-256: 4def7942cf374d732045d92b1d3c99a773bc15d63d41d77e49431208e94a7b3c
font_03_sfnt_off00012014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12014 11280 bytes
SHA-256: 6185dbba94c3b84d105cc647f7297e7df2cadf64795aa73276e59e16b59ee4ac
font_04_sfnt_off0001469a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1469A 16256 bytes
SHA-256: 305d3b0dc522515946ba3a6aafdebcc4c2fbe311c5bf21b0408f4bb03a7d09e1
font_05_sfnt_off00015c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C51 2484 bytes
SHA-256: cf0606a1108bda003892b9c12b21d0340c19d8f6aaf545b0badb14bf14f927dd

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