Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe074a57f1aeadef…

MALICIOUS

PDF

133.4 KB Created: 2021-03-19 08:23:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 59d5859eb2bd69a81f0148761622b8b4 SHA-1: db3fd9503a911a6617ea0959b4f54e2670cc188e SHA-256: fe074a57f1aeadef5a8c28c3365a70723b635f2ec54ad13be750be0120cf567e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9990

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/strik?utm_term=udi+rc+u818a+2.4ghz+rc+drone+with+hd+camera PDF link annotation
    • http://fortysgjdk.fun/2003_ford_focus_zx3_transmission_problemsos492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452392/normal_5fd26f8a9f241.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/gi3ghFC/ringtones_music_download_free_ringtone_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/nazutupim/jgrjekC/patiligoted.pdfIn PDF document text
    • http://mexicotop.xyz/windows_10_upgradecdphg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416791/normal_60217332ba68b.pdfIn PDF document text
    • https://cdn.sqhk.co/korokotuduki/cBTigAr/incontinence_sheets_disposable_for_dogs.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/twin_star_international_heater_partsxpbu5.pdfIn PDF document text
    • http://girlita.space/periodic_trends_electronegativity_worksheet_answer_keyzjc99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/48f1b790-c83a-438c-8823-0f80b6e77525/army_rifle_qual_scores.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/zuboluber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/386adfff-82ee-40ab-8b7c-ccee52b366a6/60936507029.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/lefipefiwew.pdfIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_a6b3fc95528446f399c9b1b259c6c0e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/ditaroruwix.pdfIn PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_90e31511d7e74805aeb9ff02af3e7bba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea74d8a-85d0-4482-834e-921f698843a3/41545908835.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A2 66420 bytes
SHA-256: 837c38b9711ac6e3493f70e66a053c97cfa874ab8341d8a09b49d9065d0750f1
font_01_sfnt_off0001bbc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBC9 5656 bytes
SHA-256: 7571583da7f9ce8ff3a43ca44acbbed7e9b02d822bea22258f9423fcc7186a08
font_02_sfnt_off0001cefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CEFA 13264 bytes
SHA-256: 41583924ecad63a5834fe0d49cc0141a047dad935b64600a8ad85257db4bad2b
font_03_sfnt_off0001f758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F758 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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