Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6255212091fed6…

MALICIOUS

PDF

72.6 KB Created: 2021-03-04 10:38:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c46146231d42a7510e57d3cc6bdc8864 SHA-1: 9e94a3d0d86e1f39b345f03bff4bfc0c33d9afc5 SHA-256: cd6255212091fed6f3116571b83bc5f3667ec2cf5d58022c1f678bf7d3b5792f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of numerous links on disposable hosting suggests an attempt to evade detection and distribute a payload or lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://resalured.ru/wix?keyword=smart+goals+for+business+analyst PDF link annotation
    • https://cdn.sqhk.co/goduwonon/d4qA8ge/draw_something_game_ideas.pdfIn PDF document text
    • https://rezigetofetima.weebly.com/uploads/1/3/1/1/131163738/dc782f682b40b.pdfIn PDF document text
    • https://sapobukemofox.weebly.com/uploads/1/3/5/9/135974899/ddfda6cb.pdfIn PDF document text
    • https://nemanuvipiza.weebly.com/uploads/1/3/1/3/131398236/3086150.pdfIn PDF document text
    • http://labijubitif.iblogger.org/cybex_vr2_leg_press_manual.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/zawaseke.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/isu9yjf/favugibonizawefebupe.pdfIn PDF document text
    • https://mirigemiw.weebly.com/uploads/1/3/4/7/134753474/65831426c.pdfIn PDF document text
    • https://cdn.sqhk.co/furugilenu/6tjiRjj/gazotaxeruzagedowibiw.pdfIn PDF document text
    • http://venolilixe.mygamesonline.org/george_foreman_digital_family_size_smokeless_grill_grd6090b.pdfIn PDF document text
    • https://bujefodamefizup.weebly.com/uploads/1/3/1/0/131070612/3741734.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/are_court_proceedings_public_record.pdfIn PDF document text
    • http://zebekuji.22web.org/access_online_web-_based_training_answers.pdfIn PDF document text
    • http://sukozuxari.22web.org/b_17_crew_uniform.pdfIn PDF document text
    • https://cdn.sqhk.co/vakujediraw/5zXhcih/xbox_one_x_pre_order_best_buy.pdfIn PDF document text
    • https://cdn.sqhk.co/momewoziwoge/njjThja/yeet_meme_generator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rajuxibusajebob.rf.gd/91635121207.pdfIn PDF document text
    • http://bepibuxel.epizy.com/19159860006.pdfIn PDF document text
    • http://fevejalamozek.epizy.com/para_que_se_utilizan_las_lineas_del_tiempo.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_off0000e0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DB 5432 bytes
SHA-256: 201865653db9f6ea2e1c192584207125247acdabc6fbcb890ee3f49f81841ec7
font_01_sfnt_off0000f344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF344 10016 bytes
SHA-256: 64d5f8504c2493830ed7dc914dbe951bafdbc497e4866faa6963b61a4747a159

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