Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bebafd4270718c4…

MALICIOUS

PDF

87.9 KB Created: 2021-04-06 15:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8a172b1665524b5aaddfa51d5fadd11f SHA-1: e826d853c88c112553833c12d49a22f3f06a8c19 SHA-256: 7bebafd4270718c4e484c252e8c9b99d07121d993979bb69342792b802780672
126 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spam campaign. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious or unwanted content, likely as part of a phishing or spam operation.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wix?keyword=67+ways+to+make+her+come+pdf PDF link annotation
    • https://gojanevalu.weebly.com/uploads/1/3/4/3/134353606/5892584.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/bissell_cleanview_helix_filters.pdfIn PDF document text
    • https://loxutagunepolu.weebly.com/uploads/1/3/4/7/134763456/3994128.pdfIn PDF document text
    • https://cdn.sqhk.co/vetipewalu/FihmoAu/alan_walker_songs_with_lyrics_playlist.pdfIn PDF document text
    • https://cdn.sqhk.co/fololekumi/Z8thbsZ/lego_batman_beyond_gotham_free_download_pc.pdfIn PDF document text
    • https://xavilisepu.weebly.com/uploads/1/3/4/2/134235747/7729423.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/hhhicp5/ball_roll_free_arcade_game.pdfIn PDF document text
    • https://tivositazevuzin.weebly.com/uploads/1/3/5/3/135349871/abb5e.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/giaiiAd/4779771345.pdfIn PDF document text
    • https://cdn.sqhk.co/tejosepu/MRidnhj/lisisogipenajujelo.pdfIn PDF document text
    • https://bimozasobo.weebly.com/uploads/1/3/1/3/131398313/48c73a14d25026f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8bcbed0-0c6e-4b99-9205-66035d072a1e/honeywell_quietset_tower_fan_replacement_remote.pdfIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_7017c8f96c7f41a59829d7f5c0c50a84.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/041dc666-73f3-48ec-9739-6d225e757254/38435728187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36b39236-eee3-45bc-ad9e-3467ccd07320/do_jeep_compass_have_transmission_problems.pdfIn PDF document text
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_6ba91c77174d457886ba71e48dce0d21.pdf?index=trueIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_ed0c2bceecfa45f78d84d7ebc9969f0f.pdf?index=trueIn PDF document text
    • https://9cc02d22-446e-415d-9686-6e49aadcb3b3.filesusr.com/ugd/aa6a08_b907f1d9844e4aa187d4195e20a2988b.pdf?index=trueIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_5ab7740cf3af4c27922580de2a02fba7.pdf?index=trueIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_a67129edfbbb4069b8dbd0f5116fc7df.pdf?index=trueIn PDF document text
    • http://xekabotiwuker.atwebpages.com/10927023186.pdfIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_53c65dd914cf45b681e1c0bc746f93e2.pdf?index=trueIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F9 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off0000f7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7ED 5760 bytes
SHA-256: 0dbe3e81614e0ff8e96cf2e62638a50b7727653914be75ba1201c5129910e652
font_02_sfnt_off00010b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7A 1884 bytes
SHA-256: f5a3e0886b95c9b467f99b5e94d28133f575fbf2270330b68ad91cfe8bde1cf1
font_03_sfnt_off00011498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11498 11104 bytes
SHA-256: 07c1783427f5e5ced426cc9044e04a9b51e74019dd9127aa6d214a42d0302af6
font_04_sfnt_off00013afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AFC 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940

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