Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba6834dce0d92f3…

MALICIOUS

PDF

65.5 KB Created: 2020-12-17 13:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 726a9c0675b9b3bed48a21d8ec424a35 SHA-1: 506e48af491614c9a6fb845ec95b1ba539d6cd6d SHA-256: 5ba6834dce0d92f3d1140a92f3d24511838c8e4e8d186e5667b25955829550ab
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=define+central+focus+edtpa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_5f931585e4624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389604/normal_5f8dd31e2ae83.pdfIn PDF document text
    • https://bavovazekix.weebly.com/uploads/1/3/4/6/134696550/400859.pdfIn PDF document text
    • https://getedizexagan.weebly.com/uploads/1/3/0/7/130740146/mabizige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393018/normal_5f8ebc7c004ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416514/normal_5fa179ef21b32.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4dba692c50b1a1e90d5f6/t/5fcb43e564036b61438aa078/1607156710678/83050592590.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/do_bilayers_form_spontaneously.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1ac7a40f1034a5cae5b81/t/5fcae9e233fb14715cb11d1e/1607133666700/3d_ball_balance_sci-_fi_spaceship.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce2d4a2ee13227da669c9a/t/5fd6c6db0f11661d4c3b70b4/1607911138282/anorexia_nerviosa.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/lunebugedulanupixiboge.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06b148139af037642cc0d/t/5fc54dc35147b14804e155c3/1606766022376/audio_typing_test_free_uk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fcf5405d5340f32a0ba8/t/5fc7c17a3ac9c763f4e42462/1606926714519/greatest_love_songs_of_the_90_s_list.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dbcbbf71053ccb0ffb78/t/5fc548905147b14804e00590/1606764690514/unblocked_games_download_call_of_duty.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC45B 5148 bytes
SHA-256: 31fe0164c9625b25fb78763ff8b02adc356b1705ddaa4f517728036c86d3c20d
font_01_sfnt_off0000d5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F6 10504 bytes
SHA-256: 03cd1c6ac7b34361563109f7b353001a145a800999d07d088918d50279b58e0d

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