Malicious PDF — malware analysis report

Static analysis result for SHA-256 103d701823ec828e…

MALICIOUS

PDF

74.1 KB Created: 2021-02-20 10:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ce9bf71de58512074f3f91f4b8970be7 SHA-1: c8a45784f9f04328d7e5c2b0406444a11c694f1c SHA-256: 103d701823ec828e3e493b90e30dcdd1261703b7a680176dc223ef569e2d7005
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors or potentially malicious domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, and 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms redirection to harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an intent to redirect users to malicious sites for phishing or malware delivery.

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
  • 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 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.
  • 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://crophysi.ru/strik?utm_term=best+architecture+drawing+book In PDF document text
    • https://zowadite.weebly.com/uploads/1/3/1/3/131380399/4114912.pdfIn PDF document text
    • https://cdn.sqhk.co/texafikogot/hc7hcid/ultimate_horse_simulator_2_bosses.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/Bgd2hbP/bloom_s_taxonomy_examples_of_activities.pdfIn PDF document text
    • http://tezosomebapixim.22web.org/habitap_apk_pro.pdfIn PDF document text
    • http://zuragaretezi.iblogger.org/xodifibimef.pdfIn PDF document text
    • https://kefelewupu.weebly.com/uploads/1/3/4/7/134711224/nibenedenef.pdfIn PDF document text
    • https://xudutufatixoli.weebly.com/uploads/1/3/5/9/135957433/9168895.pdfIn PDF document text
    • https://rawiranuxox.weebly.com/uploads/1/3/4/6/134618620/geginalezesas.pdfIn PDF document text
    • http://kopavavabigi.66ghz.com/kipukigi.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/zeworibuzoza/exercises_for_sciatica_leg_pain.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/phyllo_pastry_sheets_woolworths.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/braille_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/kanel.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/coreldraw_2019_kuyhaa._me.pdfIn PDF document text
    • http://tezebidurob.epizy.com/is_evenflo_car_seat_faa_approved.pdfIn PDF document text
    • http://jigosip.epizy.com/formal_happy_birthday_wishes_for_boss.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/story_facebook_er.pdfIn PDF document text
    • http://kalotiwinilobiw.epizy.com/bolopezokubozetiv.pdfIn PDF document text
    • http://pajimej.epizy.com/how_much_is_it_to_legally_change_your_name_in_canada.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_off0000e540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE540 5516 bytes
SHA-256: 21c4a4d86fb33948a945aa2b7cc7d79e7d810a8f64664c665e85fcdd211d7ed2
font_01_sfnt_off0000f80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 10212 bytes
SHA-256: 23d0dab0a4302d67fb656f30f193a9b6e261b51570cda277e4a40728f2a10584

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