Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04fb1e09e7aa08e…

MALICIOUS

PDF

115.7 KB Created: 2021-04-02 05:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0b32ef0d5c0c695f6cd52a61cd9657f8 SHA-1: 4723f6c076723052c45b26ba24d6b62996dc0943 SHA-256: b04fb1e09e7aa08ed47efb2507c4f2efdbed8baa3e437f0bb45690f3731b3054
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-themed, suggesting a link farm or content-spinning operation. The primary malicious URL, 'https://bologen.ru/aws?utm_term=xln+audio+addictive+drums+2+complete+v2.1.7+mac', is presented as a search result for software, likely a lure to a phishing or malware distribution site. ClamAV and ML classifiers also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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.
  • 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://bologen.ru/aws?utm_term=xln+audio+addictive+drums+2+complete+v2.1.7+mac PDF link annotation
    • https://cdn.sqhk.co/waxigapo/flGibUm/wegina.pdfIn PDF document text
    • https://cdn.sqhk.co/fovulifavu/git4Xje/brownies_uniform_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/ihgdygg/ninja_turtles_mutant_madness_mod_parts.pdfIn PDF document text
    • http://csxmoney.info/building_foundation_cross_sectionnk9hv.pdfIn PDF document text
    • https://cdn.sqhk.co/semiwewedazi/0LKlghZ/topikuwugaxexawim.pdfIn PDF document text
    • http://masajsalonunuz.com/evenflo_pivot_xpand_car_seat_base_installation_instructionscjyd2.pdfIn PDF document text
    • http://euroshopmn.space/what_is_the_other_term_of_life_course_theory54150.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/genedonapubefe/when_was_ipad_2_mini_released.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/woodcock_johnson_iv_test_of_cognitive_abilities_subtest_descriptions.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/centrifugal_partition_chromatography.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/tamil_new_cut_songs_free.pdfIn PDF document text
    • http://pikawin.rf.gd/spatial_data_management.pdfIn PDF document text
    • https://abee6ad4-cf47-459a-954e-22b9b9bb30ad.filesusr.com/ugd/4bdc6d_f03278a6c50f492c89cfdfedcf1569bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobito/rokeluzogijos.pdfIn PDF document text
    • http://jalugasazipun.epizy.com/administracion_de_recursos_humanos_george_bohlander.pdfIn PDF document text
    • http://xefowugopipuduk.epizy.com/bc_highway_map.pdfIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_030928afee784087a276fd62683af7df.pdf?index=trueIn PDF document text
    • http://vawival.rf.gd/fadefuzamer.pdfIn PDF document text
    • https://3c59ccad-08dd-474b-8af0-a42d91f20399.filesusr.com/ugd/489ff0_62732166106a44e0b736b844cbcdb425.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxunu/how_to_turn_on_big_blue_party_speaker.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/bandook_ki_photo_ing.pdfIn PDF document text
    • http://roworozirad.epizy.com/alice_in_chains_nutshell_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/27559886408.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/tippmann_a5_p90_body_kit.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE84 45968 bytes
SHA-256: 2dbff0ff610339ca0862245bc3bf510c0c607766400ddfbe4a70ab07e533aa44
font_01_sfnt_off00017a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A4D 5436 bytes
SHA-256: 2f4e8574d053988d0e2981a6f3f4e5be0019d250f6136ea464ae6f5a11aa7a17
font_02_sfnt_off00018cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CBB 10892 bytes
SHA-256: 161544c6831d55c11fade5c951ab040b7d4c71d418ca77f7d96b30618f944786
font_03_sfnt_off0001b1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1FF 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176