Malicious PDF — malware analysis report

Static analysis result for SHA-256 de813a10418b9f81…

MALICIOUS

PDF

69.9 KB Created: 2020-12-09 12:07:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ef292d4affd05239319cc8d567d03d00 SHA-1: 1ed6454275a4543aeb4e9f0fce9b06667f256f3d SHA-256: de813a10418b9f81efa10b0f2bc975439f4b28294174f1532fb1d612e148a21d
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains an embedded URL pointing to 'trafficel.ru', which is likely part of a phishing or malware distribution scheme. The PDF structure and heuristics suggest it's designed to trick users into clicking the link, potentially leading to a malicious download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/aws?utm_term=process+improvement+templates+free PDF link annotation
    • https://pasiwuguvode.weebly.com/uploads/1/3/4/6/134601834/294f47a4fbbe86.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/5fc5a84892c50b1a1e97e4fb/t/5fce89c04f39131e41824d2d/1607371203146/the_sims_mobile_mod_apk_terbaru_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc71a03f784ea51367e4fba/t/5fcea77dca1f943ff59f0318/1607378814553/33240931382.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79565504bb4653ce62487/t/5fc8e9c0b5c0dd03ebd2ecc6/1607002561071/75078112899.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1999f5e8e827d4292cb4b/t/5fc281249b1ed035382d5e70/1606582565058/5699717510.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc19cf9bdb33045eec75325/t/5fcddc4d33187724c4139cb5/1607326799124/rafupotakuwobororeratajal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae15c4ad-c07c-4024-85b3-0584598cb5b4/92602595331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddc77d1e-98a2-46b4-898d-ff0187a39911/if_i_stay_book_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b544c89e1c4b8fbd6471/t/5fc13f3f4f983757200d2359/1606500159964/low_cost_strategy_advantages_and_disadvantages.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d446ab79f442f2293e00/t/5fc1067f3c6ccf69f3820d8a/1606485634918/max_principal_stress.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e3c612facd59cec67b06/t/5fc65c4a61e25426e11137dc/1606835277510/wenatimonomonovebav.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce45288eda244dc4acbbd2/t/5fd02d61ef76c20f2d3f9a0a/1607478625849/international_business_management_salary_in_canada.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5add9f9866f3fd2f487b8/t/5fcf1b5701eaf4591e2289bd/1607408473737/shooter_of_metal_run_gun_mod_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5cbbe104edf1d77a2c1c8/t/5fd02029ef76c20f2d3d5936/1607475241344/botetezotetakun.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc16c3d6b97992eb55fb768/t/5fcaab8b538ea9548d97914c/1607117709021/54003201644.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C7 5220 bytes
SHA-256: 0a76226d8771c94c7e246888e9b4cccc6b633241c3fc6fd5596ad6d4a3ea91e5
font_01_sfnt_off0000eb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7B 10760 bytes
SHA-256: 31f735b64b7416e9a2b79f6eb552889cc3ea08a41171fd729847214befcd0a18

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