Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb27f45d848bbae…

MALICIOUS

PDF

75.4 KB Created: 2021-03-10 05:15:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: dbe47347084e0a5ce8346864a12ba4cb SHA-1: b00af81cda85f5aaed0c443c56a1e00e05c7a778 SHA-256: 7eb27f45d848bbae33db1c88b81a53964911707c7c94f25e86a8347c4fe15e1a
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and one specific URL is associated with a network adapter driver lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://jumiwimov.ru/123?utm_term=network+adapter+driver+windows+8 PDF link annotation
    • http://reassurez-moi-fr.info/emotional_guidance_scale_hickszd0qi.pdfIn PDF document text
    • http://grenkasalo4.xyz/android_adb_run_apk3vkxe.pdfIn PDF document text
    • http://torchqbfl.fun/what_is_12_step_fellowship1a4p0.pdfIn PDF document text
    • http://selectgetc.top/javopifavusmrj8o.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/a3919a36-12b2-4490-b173-7e7df64bd858/a_lesson_before_dying_essay_thesis.pdfIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_8ebe3c4604aa407e83f080f2740fdbec.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5330591-b748-4a88-9853-868c791f8ec0/what_percentage_should_you_get_on_kaplan_to_pass_nclex.pdfIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_7ab8b6c45600471e96394b5f81ae91ee.pdf?index=trueIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_3d3b73b00c5c46da92088fb5c26ae01d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9dc145e-fb8f-4bfc-a00d-c6f4967704f3/24667019594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57283090-daa8-4792-b4fa-d90021421b55/motorola_talkabout_ms350r_2-way_radios_manual.pdfIn PDF document text
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_633a16c2c8c04f02ae650728f375c8e1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/491e3826-a5ac-4318-9170-1589b6ff8167/the_elephant_man_play_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79c2fec3-cba5-405e-b86d-6d8997c31649/2010_town_and_country_touring_recalls.pdfIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_66851a80e29b4301badb55ec26b0b712.pdf?index=trueIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_edfea77172bf481c8354ce8d6377b55c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9341a893-7501-417c-abd0-88b5ddfbbf76/how_old_is_the_ipod_nano.pdfIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_b7c8f731722a4fceb2e78654d2841b03.pdf?index=trueIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_8a591e300e424097af6cdb6a9e9be68d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a429a6d3-0298-4e1f-9266-5cddbc6d5f7f/zezuwumagolupufe.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_off0000e8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F1 5300 bytes
SHA-256: 466977721f95a2678fd1130b05afd229942b8ed8a71aea5e97ab749ed426feca
font_01_sfnt_off0000fb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB25 10472 bytes
SHA-256: 3ad1cff70828f36f5c5886faaaf13f644dd27212a6b724874103fbc064c9e9b6