Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d62cadffbf5b79…

MALICIOUS

PDF

113.2 KB Created: 2021-05-13 15:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0278f228e9afd8db647166bac5edf5b4 SHA-1: 1b3bcee62c7f7c1141c6bc04dd52de55a1a53516 SHA-256: 30d62cadffbf5b794b6c5193bd4f5040cd53cb9cec12b9f12c6829773d222863
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. While the document body is heavily corrupted, the presence of external URIs and the overall heuristic firings point towards a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://pijirikuzi.iblogger.org/hssc_clerk_22_september_paper_answer_key.pdf In PDF document text
    • http://werenntaq.online/cam_icu_flowsheet_deutschghnaq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490917/normal_60057c3fd497a.pdfIn PDF document text
    • http://shothard.site/78643227440ks4o0.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/tasivojimabe.pdfIn PDF document text
    • http://tazizinujumijoj.mywebcommunity.org/bamiwanilogataze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496225/normal_5fc826247fa45.pdfIn PDF document text
    • https://melazikadoxu.weebly.com/uploads/1/3/4/5/134594637/205735b2.pdfIn PDF document text
    • http://varistop.site/wen_3921_scroll_saw_lowesxs5o3.pdfIn PDF document text
    • http://jushq.pro/why_is_my_coffee_grinder_not_workingf3cqu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465136/normal_5ff2a2c63d085.pdfIn PDF document text
    • https://madoguwulivusi.weebly.com/uploads/1/3/0/7/130775056/wafazubagusiru.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/70039218914.pdfIn PDF document text
    • https://lemuvizavo.weebly.com/uploads/1/3/2/6/132682731/nosowelitilir-doruranebidu-retinewaseza-duroditur.pdfIn PDF document text
    • http://it50life.pro/2934884419115nlp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/G1IkLG9TFNM/wb?keyword=does%20all%20life%20have%20a%20common%20ancestorPDF link annotation
    • http://sosesejuwukoga.epizy.com/wings_and_rings_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9376d363-a0c8-44cf-857c-60c0a255e889/23937373734.pdfIn PDF document text
    • http://besatewu.epizy.com/kijen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ecaf43-e761-4566-9f3e-7885e42e1114/why_is_my_tens_machine_not_working.pdfIn PDF document text
    • http://rasifufolugewep.epizy.com/call_of_duty_new_pc_game.pdfIn PDF document text
    • http://gawupuzilolo.epizy.com/avengers_endgame_assemble_scene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80b6e083-4220-4565-bbf9-8e41031cf32e/ray_bradbury_theater_mars_is_heaven.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_off00017f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F6D 5180 bytes
SHA-256: 06c046b0d3d639ea2c2bc246934af214b6193bd822fd46b632ca67918ac2e933
font_01_sfnt_off000190f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190F2 10996 bytes
SHA-256: 0e55a28673f429148b72312b336cbc218f22118eff000a6ef885998e5e3559ec

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