Malicious PDF — malware analysis report

Static analysis result for SHA-256 013e0c06f22a327d…

MALICIOUS

PDF

72.6 KB Created: 2021-03-17 12:45:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e356d7648a80f5a8e8ac6356e7038037 SHA-1: d42bead10d8c05915a6271dd5a198f0d9397ec30 SHA-256: 013e0c06f22a327d03198198aa9e001c55203b353cf5d2bb0cbb07fd27171a1a
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document body is heavily obfuscated, but the presence of numerous links to disposable hosting domains suggests a phishing or malware distribution attempt. No scripts were extracted from this sample, but the overall structure and link analysis point towards a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=change+button+background+color+android+java In PDF document text
    • http://misujupino.getenjoyment.net/harvard_business_review_strategy.pdfIn PDF document text
    • http://tisimewifexumi.iblogger.org/56256246576.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/ia7algj/chess_game_download_for_windows_10_filehippo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475728/normal_6021d16858ed1.pdfIn PDF document text
    • https://cdn.sqhk.co/luwojafewu/jZRf6Un/airfix_dogfighter_chomikuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489412/normal_604f0884c243b.pdfIn PDF document text
    • https://fekodajitor.weebly.com/uploads/1/3/0/8/130874258/578965c237.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527902/normal_5fed1075510b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379969/normal_5fcc5ea57b318.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/sVhche0/within_movie_2016_synopsis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453885/normal_5fdbdc6cef09d.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/lg_ac_error_code_ch_54.pdfIn PDF document text
    • http://wefilevazobakeb.mypressonline.com/guvikufonejirikeso.pdfIn PDF document text
    • http://bokubewere.22web.org/tax_form_non_cash_charitable_contributions.pdfIn PDF document text
    • https://zegazofegu.weebly.com/uploads/1/3/5/2/135296009/zujepebavaru.pdfIn PDF document text
    • http://lidagejelotodu.22web.org/gnar_top_build_guide.pdfIn PDF document text
    • https://zuxorubijif.weebly.com/uploads/1/3/2/6/132695980/815fe2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kedisijusa.onlinewebshop.net/kojot.pdfIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_6ee79d397652466399df9f04b57fcb90.pdf?index=trueIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_8b70bf8e619c4ceaad28ce42d4d1f263.pdf?index=trueIn PDF document text
    • http://bidexegope.epizy.com/necromancy_spellbook.pdfIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_bba52bcd8e9c4b148a8dd574653bbbe6.pdf?index=trueIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_3c79891fad5648bea61dacd93a865656.pdf?index=trueIn 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_off0000df3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3F 5268 bytes
SHA-256: d033d67ccb3b44182c500a4d41c2563b00fd88907a8f73fd1e79c8bf4b80bd98
font_01_sfnt_off0000f12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12D 10660 bytes
SHA-256: ffd5984398ba3cca1f1622a87d80dae411887388f908c572164613216eb4e81e