Malicious PDF — malware analysis report

Static analysis result for SHA-256 53393dd7f486e37f…

MALICIOUS

PDF

70.5 KB Created: 2021-03-12 12:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b6f666e82ce9748b37b2900562d1792f SHA-1: 8c5d102cd2537acc76fe3d39b873941cdf156f74 SHA-256: 53393dd7f486e37fed3e07595e3522f2e0085ccdcd206e5b3cebb02e3365a198
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 0.9991

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 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://nipisod.ru/123?utm_term=modal+verbs+exercises+with+answers+violet PDF link annotation
    • http://guzexesuge.mypressonline.com/everstar_air_conditioner_parts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417808/normal_5fe3dfcea8584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410432/normal_604a3e0bcdd6c.pdfIn PDF document text
    • http://nubatevujonuw.mygamesonline.org/dolavonidinixuze.pdfIn PDF document text
    • http://tilosag.mypressonline.com/comparison_between_deterrence_and_incapacitation.pdfIn PDF document text
    • http://gajozemexip.22web.org/aqua_regia_quiz_2017_questions_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501654/normal_603c330f9b274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402501/normal_60364bd6a9f72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_6030728a77d57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463298/normal_600d88a9f189b.pdfIn PDF document text
    • http://tivuximuliku.mygamesonline.org/75041117769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410674/normal_600bed07038f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380869/normal_5feec6c275a56.pdfIn PDF document text
    • http://kuxakutefop.22web.org/polygamy_marriage.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/5daf54f0-63d5-4252-b434-f5c94f06b4f4/what_does_service_airbag_light_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/366178fa-c775-4d16-8526-e6c8db0da6db/50268942755.pdfIn PDF document text
    • http://lekipuvuji.epizy.com/what_is_the_tamil_meaning_for_monstrous.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6e33c93-d444-4f8e-9f39-e347ef0b32b2/onn_bluetooth_in_ear_headphones_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42e765e2-82a4-4f30-86bd-728d624ea1dd/70799850561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6844db7f-16e2-4dc2-962d-a8f2b3ee0c88/walmart_canada_photo_blanket_promo_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4b847b-11f4-4594-be26-6d99f02dec5d/75835823368.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/polygamy_marriage.pdfIn PDF document text
    • http://susesibukof.epizy.com/segavuzopegozafisedovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5553a133-3fa5-49cd-92f9-4c2a8f233af1/how_to_use_lg_remote_app_on_iphone.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_off0000d74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74E 5392 bytes
SHA-256: 63860d0d93e0c225a58e19f4716834825f2b34b3a4051ea6244cd5b3c8b02883
font_01_sfnt_off0000e9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BA 10048 bytes
SHA-256: f89e3dac644f454e514090d4a1c1b70de446a3ec917b965e63920dbfddce5740

Open this report in the interactive analyzer, or submit your own file for analysis.