Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f780b87d01855c7…

MALICIOUS

PDF

62.8 KB Created: 2020-12-16 14:36:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e5f4b508ea5eef0fb34406b923c98319 SHA-1: d8f5dbfbcf763518c2c43545766d729996d3d808 SHA-256: 5f780b87d01855c75683ed63c76c9c92106ccc8abe1e49e2133bc58a5af087a7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru'. This, combined with ML and ClamAV detections, strongly indicates malicious intent. The embedded URL is likely used to lure the user to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffking.ru/aws?utm_term=graduated+cylinder+volume+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4467277/normal_5fd76b4121da5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404953/normal_5fa4824394f07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384149/normal_5f934db86b182.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392668/normal_5fc62c263b150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381297/normal_5fb3cfdce2342.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375716/normal_5fc622e532200.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/17db03df-7ad9-400a-bd45-b659afb49578/sultan_movie_hd_tamil_dubbed_downloa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a827edf-f7bb-4445-af0d-85c657e6f1c1/zizigotusipola.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce54b0888ad70830bcf59c/t/5fd05d58fc93c51d16dcd869/1607490909117/99823456118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7e4a02-34c7-4624-87fb-4dfadbba7ba8/62149130438.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/kopogodebikur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4759d7f1-2a87-4195-a063-53858cd9d282/jennie_o_turkey_loaf_cooking_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/cambridge_8_listening_test_4_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66161c17-1b44-4bc4-bbd6-0c177af84c68/22298070544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1526462f-55a0-40f0-b871-12f5681f07f8/integrated_chinese_4th_edition_workbook_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c36ae5c7695ca9b45588/t/5fc9288b98f8860e339e3308/1607018636118/ultimate_robot_fighting_game_mod_apk_download.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_off0000b972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB972 5528 bytes
SHA-256: e856ab550a7dfd959a295a7f135ff75e382f8152bb022c8c72541ee9234e3d13
font_01_sfnt_off0000cc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2D 9964 bytes
SHA-256: 19c94df4be5b5f8cbfeb9c2f1ddf5ab412fac0af5942e0b1af0c380cbfb84fab

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