Malicious PDF — malware analysis report

Static analysis result for SHA-256 47654f6140f3394e…

MALICIOUS

PDF

76.8 KB Created: 2021-04-07 21:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19abc7ce5c7a865a4d4759ef4d8d8ae8 SHA-1: db4fb31038cb161eef570a77a626625618f0e57b SHA-256: 47654f6140f3394e705d6bf7efa724a1ada8df1cf95730229568d315f6b98fa2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO-themed, suggesting an attempt to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a malicious document designed to exploit users seeking specific information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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/strik?utm_term=family+therapy+concepts+and+methods+nichols+pdf
    • https://manoduxasef.weebly.com/uploads/1/3/4/0/134041035/32785.pdf
    • https://cdn-cms.f-static.net/uploads/4459482/normal_603763e405a87.pdf
    • https://cdn-cms.f-static.net/uploads/4488842/normal_603724fc6e7ef.pdf
    • https://cdn.sqhk.co/vaziworab/Fhbhjjc/math_worksheets_volume_of_a_cylinder.pdf
    • https://cdn-cms.f-static.net/uploads/4449968/normal_6049c1cfd34c5.pdf
    • https://cdn-cms.f-static.net/uploads/4411245/normal_605987339b664.pdf
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/53ecb.pdf
    • https://cdn-cms.f-static.net/uploads/4469643/normal_600dde8cceca9.pdf
    • https://cdn-cms.f-static.net/uploads/4505839/normal_605424b23c5ac.pdf
    • https://kumobavubisu.weebly.com/uploads/1/3/0/7/130775432/5455033.pdf
    • https://cdn-cms.f-static.net/uploads/4370268/normal_602eec8aa90aa.pdf
    • https://cdn-cms.f-static.net/uploads/4485161/normal_6023f6dc9c292.pdf
    • https://cdn.sqhk.co/naxupowu/GMvdjf3/draw_in_game_pigeon_chess.pdf
    • https://cdn.sqhk.co/boxewemutox/fjbij9t/51649717186.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/1cb76c6e-663c-4515-88cb-255e42abb3cf/carel_easy_controller_error_codes.pdf
    • https://uploads.strikinglycdn.com/files/a74f5c24-5c18-49c4-8aab-3b493a9df059/how_to_troubleshoot_ac_thermostat.pdf
    • https://6593eeda-10fe-4128-810f-cbbc79f0a4f8.filesusr.com/ugd/c0a4bf_d0f1e24dd547467584b86034460a66fc.pdf?index=true
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_d6e2fa0f81024a42a326ee6ba16d1b6d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e13cbc23-b16e-4a3a-be7f-49f5555f3c2a/pakatobakora.pdf
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_b069cb4eba604359bcaf27d4f1d54bd7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2bef0746-9b6a-4398-960f-a2f9740914ac/sebulewubo.pdf
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_5bb5149333d648bfa688c5fdf1dddc97.pdf?index=true
    • https://1b6a1bbc-c127-422b-858f-c975555fd18f.filesusr.com/ugd/31f47c_fb7f1e136bf64706ac1ea243b9b6c43d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1844ed2d-ef27-47e2-a370-6138971607bd/john_fraser_secondary_school.pdf
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e23e.bin
0ab06952d311673c33d6edda06602c0a813aaae2b4998f926c9b1267cfc20493		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE23E 5240 bytes
font_01_sfnt_off0000f3e1.bin
b326fcf2112457d089758fe70405967b714269d02fe7bccdfe4b2261f6c362f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E1 10456 bytes
font_02_sfnt_off0001176d.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1176D 4324 bytes

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