Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44eac51a16ea751…

MALICIOUS

PDF

132.4 KB Created: 2021-03-24 04:11:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c6f25c8156924d47d394e711b21c1b57 SHA-1: 32f37dbc3e97a6a0a50ca828e7c0011b20f2d96a SHA-256: d44eac51a16ea75127d56a9e67005bcf4220a5706e00b145a46838345f5a0ab1
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 content. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded links suggest an attempt to redirect users to malicious sites, possibly for phishing or to host further malware, aligning with the 'Pdf.Phishing.Trojan' classification.

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://dafemum.ru/wix?keyword=words+that+starts+with+gi In PDF document text
    • http://raftgjgr.space/traffic_moto_bike_attack_race_apk9o6v3.pdfIn PDF document text
    • http://lovemecompletely.com/562444352059uia3.pdfIn PDF document text
    • https://sixumegeb.weebly.com/uploads/1/3/4/4/134476160/d3c26c7.pdfIn PDF document text
    • https://pojojozujivalim.weebly.com/uploads/1/3/1/1/131164399/wimuv.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/how_to_not_be_a_christian8zsss.pdfIn PDF document text
    • https://wufewevaso.weebly.com/uploads/1/3/1/4/131453291/zaranuwivis.pdfIn PDF document text
    • http://psychologyrelax.xyz/icse_class_9_merchant_of_venice_workbook_answers_downloadbxm8j.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/purixifusipelid/37684661500.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_12bf7b6b2fdc495b93db16a6bd85e2da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zesotat/concepto_de_titulo_de_credito_y_su_clasificacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f2debed-8f39-4883-8bac-de0c2a0d1fec/short_batman_bedtime_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac8df908-afd3-47c2-9759-defefdd70160/32538229246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba544d04-3db8-49cd-ad14-d67a10fd4f62/god_in_the_dock_audiobook.pdfIn PDF document text
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_9cce16b810a6401f956c8c124826eacd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/meliligepud.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/what_do_you_write_in_a_21st_birthday_card_for_your_nephew.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/54115498723.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/xedajotere.pdfIn PDF document text
    • https://21d44941-995c-48b9-956b-8145330e20d5.filesusr.com/ugd/577b75_3b1b5cdc0e844fa7bcaa1b50ffed0b9f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/65cb7328-47b1-4b51-b25f-12f716f637e1/the_blind_side_film_review_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd305cb-d5a0-4215-a060-33a585ae4e81/ropekezeguronazelo.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/dafusarejipived.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_off0001caf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CAF8 5160 bytes
SHA-256: 1ccf7f333674a6a4c609499b2a28af9f722e79bda5487c7a94482e918d7f024d
font_01_sfnt_off0001dc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC95 11472 bytes
SHA-256: 8dc2da57ea6e506e837001b9130e86b83d4edca2fd927da0ac71b74f2350e1a0

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