Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2110f659bd6d43c…

MALICIOUS

PDF

92.4 KB Created: 2021-03-10 13:18:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3e10c267e6d769e00929c36296bfc50f SHA-1: ea1c1e32b71bf079d33f5890ef9a42edc2218298 SHA-256: f2110f659bd6d43cb44ff63ac91629945896d58790faf47e610bf5b538b41512
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/wix?keyword=bernina+sewing+machine+repair+manual PDF link annotation
    • https://marutonekuposew.weebly.com/uploads/1/3/1/6/131606360/2ea174.pdfIn PDF document text
    • https://putujagojosid.weebly.com/uploads/1/3/0/7/130738675/3426843.pdfIn PDF document text
    • https://nemerode.weebly.com/uploads/1/3/0/7/130775229/xuwimubu-foguzibowiwenel.pdfIn PDF document text
    • https://gudufuremozowa.weebly.com/uploads/1/3/4/4/134403830/5704893.pdfIn PDF document text
    • https://lemorixumo.weebly.com/uploads/1/3/4/7/134748879/jiwosazur-dikigopamoris-metinirubitivum-fudegoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xapota/lulilefofamufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e17dc03b-5d86-45c2-8505-be41eb64d04c/jowunavekirijulofuxojej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0147336a-1221-46ae-aa10-fa776a6158b7/mesa_boogie_mark_iv_head_case.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/jurassic_world_2_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/nibufipirubonaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b159d5b2-12ed-4d4b-86a7-0f4b92574989/is_the_lincoln_mks_a_good_car.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d434e48e-5535-4620-9d4e-f3825f1e5062/76987615530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9148059b-c190-481c-821a-33734f5c7a5a/16315836038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd5160b-6fcd-4d8f-9107-3aacecb95738/3323511122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a85638f-7de7-4e8e-8d87-0077a1e15e75/xudelagajinorizuxirabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d11f4c58-9f0c-4d5c-9900-4aa522d56813/jbl_flip_3_stealth_edition_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df4e655-3ed7-4ad4-b173-d27196769752/sony_tv_remote_codes_5_digit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f687a2-0a5d-4e62-a835-7b32c88ac78b/python_pandas_tutorial_point.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8021fe7a-67fc-4249-a581-29ce0081cdf6/hamilton_beach_6-slice_easy_reach_toaster_oven_with_convection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39977b8c-f33f-490e-af8f-0da690fede9c/vaxiridilofebevegekuvepu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/rajasthan_jail_warder_exam_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd2369f1-7f94-4160-adf3-a9eef7fac516/25078563778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00cecc71-ef5d-43bc-a2f9-bdd1613a3ff2/questions_to_ask_couples_in_premarital_counseling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b916587-f663-497b-a866-273252bb942a/52825166965.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_off00012d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2B 5488 bytes
SHA-256: 8aa939ddb3df1a970f0cf8808e3d43ac5b2781c681428cd36196c5724e86d392
font_01_sfnt_off00013fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC5 10476 bytes
SHA-256: 11f50e92775593d8c88185f1d367eb5eff94e061fb00647be27b2fd6150f95aa