Malicious PDF — malware analysis report

Static analysis result for SHA-256 f27c1fdd0b1aa37e…

MALICIOUS

PDF

93.5 KB Created: 2021-05-19 03:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 03891cd7b7c1fd15ffbeebe1267c6a76 SHA-1: 715814c3053c486aa0029dca265cf6671f81b501 SHA-256: f27c1fdd0b1aa37e9b53ddf8f6516f93a47945a441210f5ff0aa900e0d416d67
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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
  • 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://dugedepap.ru/strik?utm_term=ejercicios+resueltos+de+oraciones+compuestas+coordinadas+y+yuxtapuestas PDF link annotation
    • https://jimusojimewem.weebly.com/uploads/1/3/5/3/135351043/kapebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486060/normal_606c0b090ff0e.pdfIn PDF document text
    • https://zozabamefopofa.weebly.com/uploads/1/3/4/2/134234868/xijen.pdfIn PDF document text
    • http://garirixis.22web.org/brain_out_level_13_answers_walkthrough.pdfIn PDF document text
    • https://tixilumudesowor.weebly.com/uploads/1/3/6/0/136095614/800016267f00b7f.pdfIn PDF document text
    • https://rejasujewefem.weebly.com/uploads/1/3/0/7/130738882/kesewadoxodexaf_numew_futunugusirodi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481510/normal_5fec0c6c930a9.pdfIn PDF document text
    • https://zowukudikumo.weebly.com/uploads/1/3/1/3/131382828/8539025.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d5f1763-fe70-4325-83d2-3b01e93465f5/how_to_create_custom_drum_beats_in_garageband.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0447d2-39e7-47a7-b203-392659fe5807/slaves_to_darkness_start_collecting_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/5372373273.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/71137407506.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/shadow_work_prompts_for_trauma.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/auto_clicker_root_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/6972730733.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/xokawemurejobenali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1033170e-4e5d-482a-911a-dbf65386d6d4/65427776111.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/divegenojadenakefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b92a5413-3de1-4911-a268-2a4e96e6ad26/scott_trench_set_for_life_podcast.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/bidesiya_bhojpuri_film_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69600392-69d6-4877-a99d-053ae94e79d1/phishing_page_maker_apk.pdfIn PDF document text
    • http://vizumun.rf.gd/87717010389.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_off00012cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CBE 5420 bytes
SHA-256: 74217f2dff7e686253e538e69ed971bd1e741e484673d025517a79d269e01fb3
font_01_sfnt_off00013f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F2B 11992 bytes
SHA-256: 93f3332cec394c03732ae9f4f7a3564fbe958f7c7e1f3b683fcee1936d281458

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