Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d8ae2e3a61aa447…

MALICIOUS

PDF

84.5 KB Created: 2021-03-17 00:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 51c53f6005fa92192e66fdb0a8db4f8f SHA-1: 175fbf6694cd650a527fd01f96f7a95a1e075112 SHA-256: 4d8ae2e3a61aa447e482e4c455d6be049da24153e6e1a629842c8b2d5c58c8cb
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 0.9994

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://pelibifir.ru/strik?utm_term=how+to+power+on+switch+pro+controller PDF link annotation
    • https://gejodawutu.weebly.com/uploads/1/3/1/1/131164152/5469968.pdfIn PDF document text
    • https://cdn.sqhk.co/lixipadiwel/8jdegjr/brawl_stars_box_simulator_ohne_download.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/iexZQha/charlottenburgh_park_cornwall.pdfIn PDF document text
    • http://muldwych.com/86400794025c1sxe.pdfIn PDF document text
    • http://playmarket-online.com/48011622834kxjhj.pdfIn PDF document text
    • https://zevixaxilifudex.weebly.com/uploads/1/3/4/1/134131629/8662578.pdfIn PDF document text
    • http://mitsumoro.ru/xalalofikofakevomsy1o5.pdfIn PDF document text
    • https://jesomufufasak.weebly.com/uploads/1/3/1/8/131872286/wajolaseralat-popawimojuru-verebe-xalewogelebanix.pdfIn PDF document text
    • http://oblakova.ru/63890627378pl0na.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/hfjc0Qn/tikajulomifuregeduxag.pdfIn PDF document text
    • http://giveaway2020.info/porque_salen_piedras_en_rionesm500v.pdfIn PDF document text
    • https://gofegupozomo.weebly.com/uploads/1/3/4/4/134479888/42c6da.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/kozibowisenatu/bulletin_de_salaire_excel_formule.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/weakness_job_interview_example_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/sijopemirenomu.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/lajelazadarakigijesuri.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/fewezaku.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/56652534084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da4805b2-6522-49ac-ace7-813e1e818acc/midi_to_sheet_music_notation_software.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/fepafuwig.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/politically_incorrect_guide_to_civil_war.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b2ba4da-bd98-400a-83d2-e59380603f34/tejimelemudutokupo.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/wave_motion_equations.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_off00010e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0C 4864 bytes
SHA-256: d07a308a187f9ed53304780c49c50f73869d49ea1051e55f41e286e19b3cb5cf
font_01_sfnt_off00011ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA7 11148 bytes
SHA-256: d07ed8962995a25ad846214103397ffb0a7c0353352dbfde6380d0f7b172f6c8

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