Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d53c82f96f91b4b…

MALICIOUS

PDF

79.7 KB Created: 2021-03-24 13:17:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00e664dc9830ac2db6c2cbb0f46e007c SHA-1: 44cea5d1d7c65e965551556afef73d3164309c52 SHA-256: 1d53c82f96f91b4b0307db41ed4523cdcae2fd5822f3c284a77324e57817d77e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, forming a link farm, with one prominent URL pointing to a suspicious domain. This suggests the document is designed to redirect users to potentially harmful websites, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a malicious distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=planned+parenthood+-+perth+amboy+health+center+perth+amboy+nj
    • http://goldstein.capital/661921592138vgbp.pdf
    • http://yoga-fitness.space/zakafuxibarivozepix8ow6z.pdf
    • http://wixiziz.iblogger.org/thomas_l_floyd_digital_fundamentals_10th_edition.pdf
    • http://ig-copyrighthelpcenter.com/15068422067kh3fn.pdf
    • http://cafechorsu.ru/i_love_you_samantha_sheet_musicm7fwb.pdf
    • https://wajiwojoduposop.weebly.com/uploads/1/3/1/3/131379590/muful.pdf
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/354102.pdf
    • https://jogabaxeke.weebly.com/uploads/1/3/4/7/134704809/7121918.pdf
    • https://budazibidoware.weebly.com/uploads/1/3/5/3/135386773/d95e78d5b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/41917aff-20c6-4d36-9ab4-adfa997b4b44/mebotavojelulokofuwabukaj.pdf
    • https://s3.amazonaws.com/suzujewa/zanelapibafuguwego.pdf
    • https://uploads.strikinglycdn.com/files/849d1733-b50e-49e7-bbbb-da321ceb7b99/gamupalasop.pdf
    • http://sesilav.rf.gd/supikejefeg.pdf
    • https://uploads.strikinglycdn.com/files/6fd55f43-2bcb-4791-bd63-9fd3200fedfb/nabomedo.pdf
    • http://wekolaxoretewov.epizy.com/bls_study_guide_2020.pdf
    • https://uploads.strikinglycdn.com/files/74602f6e-09a0-4b0e-b2b5-25f5b2c1e8fb/gandhi_biography.pdf
    • https://uploads.strikinglycdn.com/files/e2536952-f902-48c8-ba57-ec34fcda889b/world_history_project.pdf
    • https://s3.amazonaws.com/potofaw/agentes_carcinogenos.pdf
    • https://s3.amazonaws.com/tokatefozude/hss_first_terminal_examination_2019_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/b264c5d8-a7e4-44dd-9ae4-b6e692a2af30/new_home_construction_final_inspection_checklist.pdf
    • https://s3.amazonaws.com/fajujiju/eagle_required_merit_badges_list.pdf
    • https://uploads.strikinglycdn.com/files/f3baa183-7b39-4e97-89ae-1eb31b610cf0/xejawubuninaz.pdf
    • https://s3.amazonaws.com/nefomojuwet/pufipowixawupoxemu.pdf
    • https://uploads.strikinglycdn.com/files/e509e7f3-0f9c-4af2-acff-5229ddbb163c/the_importance_of_being_earnest_film_2002_review.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6fb.bin
f8dbb0ddb457a43f463c1bb22d2ee60622debb9e68241357547a62b8d21b1d7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FB 5488 bytes
font_01_sfnt_off00010984.bin
dc71b4b207bb59cf1b2bffa42d1148edfd02c1a4a23c998e43ffd312a137c9a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10984 11396 bytes

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