Malicious PDF — malware analysis report

Static analysis result for SHA-256 08beba22bef62367…

MALICIOUS

PDF

61.4 KB Created: 2020-12-04 00:07:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69a2dc4f5d170b068cd3b321053a3351 SHA-1: 78a1faae0c1f0f9781569fa19dc14d3df1b08db0 SHA-256: 08beba22bef62367c94ba8e2f3a6707668491bda057908c1b1275cbd78d27bef
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics, including a critical finding for a malicious redirector link and a PDF link farm. The embedded URL `https://cctraff.ru/strik?utm_term=wethersfield+public+schools+calendar` is flagged as malicious, indicating a likely phishing or malware distribution attempt. The presence of numerous external PDF links suggests a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/strik?utm_term=wethersfield+public+schools+calendar
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/xewemu.pdf
    • https://bulewafaki.weebly.com/uploads/1/3/4/6/134682315/bikafufe-nojoredazowizo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6f36302e-414e-4bd4-8a6a-c78079c4f70c/rebudefekapowilu.pdf
    • https://s3.amazonaws.com/sezebepit/origins_fire_staff_code_with_torches.pdf
    • https://s3.amazonaws.com/kavalukato/fefetezuzewozuwujiwumi.pdf
    • https://s3.amazonaws.com/dutuzanob/fms_3000_manual.pdf
    • https://uploads.strikinglycdn.com/files/dd366e90-27db-414d-bceb-fbba8b7b753c/46542888798.pdf
    • https://s3.amazonaws.com/jamokaroxoj/70674212066.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfe3564be903ae6409521/1606221367582/macaron_class_near_me.pdf
    • https://s3.amazonaws.com/tikofaketonub/xumewalivafesukij.pdf
    • https://static1.squarespace.com/static/5fc2b03bbd14ff0dd2a824dd/t/5fc750da6beae4543163f8d4/1606897884793/darona.pdf
    • https://uploads.strikinglycdn.com/files/0b6c1f5f-fc25-45f4-b7bd-a6e2d43acc36/kefole.pdf
    • https://s3.amazonaws.com/guwutivupudutu/arowana_feeding_guide.pdf
    • https://static1.squarespace.com/static/5fbfe7e212facd59cea75dab/t/5fc0e8442dd96f5918107a43/1606477899126/restaurant_story_hack_apk_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5a1.bin
791a7edad620107d327ddcddac82cc40f92c843feb8d224c3f1d44965dc530f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5A1 5396 bytes
font_01_sfnt_off0000c7f8.bin
6723005a9daf7c84f1627c81c166ffd360c88a03f05d0100b8e1d1359ff2789d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F8 9588 bytes

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