Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b5c48a2f825628…

MALICIOUS

PDF

68.2 KB Created: 2021-04-22 00:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 76138aee965260f2eb446051abe6277f SHA-1: 2613978c298172b1e06a89cf293956e7adcc1ce1 SHA-256: 96b5c48a2f8256283c7d8809a761d2265db49907c28bff12c94ddbb7a88df366
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing a large number of external links pointing to various domains. The primary URL, https://lozipotod.ru/strik?utm_term=microsoft+flight+sim+xbox+reddit, suggests a potential phishing lure related to 'Microsoft flight sim xbox reddit'. The heuristic firings indicate a deliberate attempt to create a link farm, with many links hosted on disposable or less reputable domains, likely to distribute malicious content or phish for credentials. No scripts were extracted, but the structure and URL patterns strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://lozipotod.ru/strik?utm_term=microsoft+flight+sim+xbox+reddit PDF link annotation
    • https://wobereresexo.weebly.com/uploads/1/3/1/6/131606335/87d3a.pdfIn PDF document text
    • http://pamatidela.getenjoyment.net/skripsi_kuantitatif_pendidikan_agama_islam.pdfIn PDF document text
    • http://rixadixiji.scienceontheweb.net/multiplication_of_binary_numbers.pdfIn PDF document text
    • https://mufuxavezefajox.weebly.com/uploads/1/3/4/4/134497947/ccd6e6.pdfIn PDF document text
    • https://govipilod.weebly.com/uploads/1/3/4/6/134651664/bibadovum-sumavazon.pdfIn PDF document text
    • http://gelufose.scienceontheweb.net/lasikupebaju.pdfIn PDF document text
    • https://pobunusegem.weebly.com/uploads/1/3/4/4/134460984/2079775.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/99313792804.pdfIn PDF document text
    • http://lofoporubatul.mygamesonline.org/repudatelasapeluwavemuda.pdfIn PDF document text
    • https://roxeviviko.weebly.com/uploads/1/3/5/3/135317288/1471723.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/a0599de0-7e83-4dcc-a894-830f59a28051/ravijejuvinitupole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c12a738-0134-4ffb-93bd-b32b06bdcbba/wusukitudebemodepaxumaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7242de4-b141-46a1-b221-7c85bb751517/goat_simulator_ps4_trophies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fd89932-da2e-4abe-8de5-4043e89ba55d/alphatrak_2_test_strips_petsmart.pdfIn PDF document text
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_3fda31af73d048889b44a94d7361a0e4.pdf?index=trueIn PDF document text
    • https://19004eff-8f5e-45b0-b15a-9fbdbd99e39d.filesusr.com/ugd/578ea4_2e48b7d296fd44cd84b25dcb91908bbe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47bc576d-4536-4dbb-bcc1-38a67024d006/midorikowadulesol.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_9ca5a8bdf3a846bcbaf77a975a36a3c6.pdf?index=trueIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_03be6a5d4e6544d09456e9fc32dfa2bc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/15c3438a-2bb0-4334-a67b-3b7f7b872a24/what_conflict_resolution_technique_is_most_effective.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_off0000cf58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF58 5436 bytes
SHA-256: e56722544de5f5ce096cb96a0cb266045abcf8dc99c943dbb1bf3e088de55c95
font_01_sfnt_off0000e1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B8 9876 bytes
SHA-256: f9bd6d2951744a292805eb99ce6d2145f6336e0d25f57545c95711219e6a60dc