Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1baecbc20ce0db1…

MALICIOUS

PDF

74.1 KB Created: 2020-11-30 20:42:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d153969214958b0e1aae2c3cf10b0cbb SHA-1: d7b7460410892834e39408b1cb62fe74047b5362 SHA-256: f1baecbc20ce0db166914d48b00f696603891025cc8af17b12557b0c83768763
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffnew.ru/strik?utm_term=3d+pool+games+unblocked PDF link annotation
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/bidumuf_lonunoguditek_zoxej_gugemewelaku.pdfIn PDF document text
    • https://joverukaded.weebly.com/uploads/1/3/4/4/134433057/38656e9f536e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455876/normal_5fa5d56696d1b.pdfIn PDF document text
    • https://xizodekez.weebly.com/uploads/1/3/4/7/134769153/b9e050db62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474720/normal_5fb93bb972d20.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/wetawewo.pdfIn PDF document text
    • https://wujibinofowe.weebly.com/uploads/1/3/1/3/131383737/jivobopiwileva_bawivad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e727ea4a794d5645064f/t/5fc142a9173fb5383bd0aeb0/1606501034575/for_the_sake_of_the_world_chords_worship_together.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/islcollective_computer_games_worksheets.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4ca29ee0f32b8749f73a/1606372515364/fur_elise_piano_easy_letters.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/suggestion_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/98964749121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1cf3600-7345-4959-9701-0f1de18a30cd/jacob_jensen_alarm_clock_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/73583303037.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/gram_negative_bacteria_cell_wall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99eb8903-c3c0-4733-b227-fb1ddafb1461/9383820358.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_off0000e5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DE 5572 bytes
SHA-256: 58324a3854b12de74152bf722df5eec3be4271903c54b8cabeeeae9bf25f50b9
font_01_sfnt_off0000f8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B8 10356 bytes
SHA-256: 1449f1e451cfde42e2eec382a1306bcba363f75e25606f9a18641a973eef163b