Malicious PDF — malware analysis report

Static analysis result for SHA-256 154faed7ea525977…

MALICIOUS

PDF

81.9 KB Created: 2021-03-19 12:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 739ce4e97d3aa99be8e944d3ef153f80 SHA-1: 5a73c36ff8785b6fb707165184091ef7fd2ba55f SHA-256: 154faed7ea5259770ce5dbcad86ad889487ef0ffd791fbf4eb64845fde3ed07f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one pointing to a suspicious domain ('golowaki.ru') that is likely part of a phishing or malware distribution scheme. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further suggests a malicious intent to use disposable hosting for deceptive purposes. ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/wix?keyword=eric+conrad%2527s+eleventh+hour+cissp+study+guide PDF link annotation
    • http://nijepatexosanus.medianewsonline.com/causes_effects_and_control_measures_of_nuclear_pollution.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464850/normal_6032f12ac3317.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/rotivudeduxubebob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383128/normal_5fd6815cb3d0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384645/normal_604ab97888ce3.pdfIn PDF document text
    • http://bulepozobagepud.mygamesonline.org/zares.pdfIn PDF document text
    • http://ruxenawuxovogu.getenjoyment.net/65973814740.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368760/normal_5ff45ec19052a.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/3f702fcd-b047-4602-b44d-60356999d553/programming_for_dummies_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d4724c3-ef7c-41b7-a38d-611c77849928/sijusifutumupove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1633aea7-fb94-47f6-ae52-dc445fe1c650/17880042947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa109fb-05d0-46a1-b25a-8c93a5e3e104/how_to_tell_what_size_bobbin_you_have.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/948a84a1-aaed-4e5e-84c2-dddcdbf2b9c7/rafulajuperisonezupi.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/channel_7_tv_guide_sydney_sunday.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/mikupap.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/jurug.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/94104716768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/364000e8-89bb-451e-8b1f-7a1bd92fd0db/why_is_my_washing_machine_not_getting_power.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/61332291419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89bad4e4-1d68-4119-b34f-feb788162830/sennheiser_ew_100_g4_e945.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/amelie_soundtrack_piano_sheet_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7508ee28-cd81-4a43-983e-4042447f8b1e/1282459313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7b0acdc-3ebf-4140-8383-3d6c6c11b2f5/should_i_read_the_raven_cycle.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_off00010315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 5488 bytes
SHA-256: 6d8bc6bec537b0b736556de8f6063bc0bcea0f21019b77d67956aae309a4c489
font_01_sfnt_off000115d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D0 10584 bytes
SHA-256: 74e87219196b844b10f254667f890a94d7cb7a734b1fa772f382069a8badfb49

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