Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d391afa47e51c2…

MALICIOUS

PDF

76.5 KB Created: 2021-03-09 11:27:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b54d5ea524076a6c31997cb6097e6177 SHA-1: 567db0d694a89a7d6fbb686245955b2d15d7cb86 SHA-256: 83d391afa47e51c22b449307e231b75d503f2b86fe89ce5acfecc2aea0d17a74
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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
  • 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://gimoguvi.ru/award?keyword=regular+employment+contract+philippines+pdf PDF link annotation
    • https://tuvaruwa.weebly.com/uploads/1/3/4/7/134711775/028c62aa02b.pdfIn PDF document text
    • http://topfrag.rip/schedule_d_2017_tax_worksheetp68yt.pdfIn PDF document text
    • https://bogobesupagal.weebly.com/uploads/1/3/0/7/130775478/sakomumo_namidobuxonebot_wunabenegewumi_pukalafu.pdfIn PDF document text
    • https://kutebebi.weebly.com/uploads/1/3/4/5/134528954/d073a00d.pdfIn PDF document text
    • https://wofugegiperezaj.weebly.com/uploads/1/3/4/5/134528457/kegomeki-fexigamurovigim.pdfIn PDF document text
    • https://rubebukani.weebly.com/uploads/1/3/0/7/130740450/5197032.pdfIn PDF document text
    • https://pebezudaxefen.weebly.com/uploads/1/3/4/3/134347708/nexewojukinit_tusurevirulage.pdfIn PDF document text
    • https://rofosuvobatijam.weebly.com/uploads/1/3/4/6/134661532/rilipuwatabudiji.pdfIn PDF document text
    • http://trysol.xyz/what_is_stoplight_in_italianr7os3.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/gupojakami/25997102701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbcf91b6-0798-4a8b-b04f-c2244866969e/41125817159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a01ea3b6-380a-45c8-84ca-1fac5f93996b/are_ge_washers_and_dryers_reliable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edfe2d87-6ae8-4e35-8bb1-ddbd0fc79ed9/16465851074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a718df73-01d2-4061-bef4-1b52bff0ffe7/matematicas_financieras_libros_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cefefee-c237-49bc-bb2e-843da8d7fde5/directv_genie_mini_not_responding_to_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/deutsche_telekom_ag_csr_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/crop_bitmap_android_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb1b7a95-41b4-474e-b030-816a91ad26ec/xexesatilakewapajowaguz.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_off0000ef2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2D 5680 bytes
SHA-256: f5120abb048c78f9cb78599de84cba97807d008e5b99254f8aef85e29e2a6eff
font_01_sfnt_off00010269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10269 10032 bytes
SHA-256: 344511dfda18b5e9a078c21110972497e90123c5167a3fee31f04e93899f5292

Open this report in the interactive analyzer, or submit your own file for analysis.