Malicious PDF — malware analysis report

Static analysis result for SHA-256 58eb40c1b3c4b917…

MALICIOUS

PDF

95.3 KB Created: 2021-02-25 13:48:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: aee78047c15690c28359c1955c3c4353 SHA-1: 7da2d494c213437f422a2243c8700abec27688db SHA-256: 58eb40c1b3c4b9175f9250536d164954f4d09676d6bd5bddb5c06d14f4a3e70a
244 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics as a malicious redirector and link farm, containing numerous external links pointing to potentially malicious domains. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the structure and heuristics suggest the document's primary purpose is to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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=soul+eater+episode+14+english+dub+youtube In PDF document text
    • https://cdn.sqhk.co/lupokuna/ijcliac/sizovufapinoxamesi.pdfIn PDF document text
    • http://idealica-ordina.site/cowboy_zombie_shooting_games_xbox_one5g8or.pdfIn PDF document text
    • https://jejaxome.weebly.com/uploads/1/3/4/4/134443668/vibak.pdfIn PDF document text
    • https://binemipo.weebly.com/uploads/1/3/0/8/130874238/3616308.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/kjhAggL/vexoxejamovirazijobe.pdfIn PDF document text
    • http://fotonagosuslugi-01.space/lifetime_movie_club_app5o1wb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378599/normal_5fce5f0cd2329.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/zkizvgj/jeux_de_3d_moto_simulator_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417212/normal_6030542ad7e15.pdfIn PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/jd3jbge/rally_car_parts.pdfIn PDF document text
    • https://monowulesamewul.weebly.com/uploads/1/3/2/6/132682048/2819482.pdfIn PDF document text
    • https://roxadaxakisa.weebly.com/uploads/1/3/1/4/131437443/ffc4bc0235a92.pdfIn PDF document text
    • https://cdn.sqhk.co/mafozerekat/6lSTjd7/mazel_tov_wedding_anniversary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451970/normal_5ff278efaeea2.pdfIn PDF document text
    • http://yeswins.space/billions_arousal_template_online23fcu.pdfIn PDF document text
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/34541fc5e35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/baby_sleeping_bag_temp_guide.pdfIn PDF document text
    • http://pupenedu.rf.gd/75755383353.pdfIn PDF document text
    • http://sejedusodumevu.epizy.com/dezetukotironefiguweresa.pdfIn PDF document text
    • http://xugonapo.rf.gd/what_is_the_power_of_self_knowledge_in_personal_development.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF1 5708 bytes
SHA-256: f179bd38adc55c0571791eaed911fbb4311fe0c844e366305b9f45beaf2b9680
font_01_sfnt_off00012157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12157 6920 bytes
SHA-256: e9e8093fd2d1da5b18272a11f6aa68bbc429cbca6805f21889bdd487860eab88
font_02_sfnt_off000133cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133CB 10376 bytes
SHA-256: 793de7a62cbaa465a05723ba900e0c17156100ff1b957da1023ec044dc31b694
font_03_sfnt_off00015785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15785 16204 bytes
SHA-256: 514ec34c774379c82780ce3b826aceada3291152a2a4734d997485cf707bbc49

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