Malicious PDF — malware analysis report

Static analysis result for SHA-256 70be69f0b8bb7c90…

MALICIOUS

PDF

87.8 KB Created: 2021-04-02 19:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 69332c2ba6113eeb9380b836c2fb8305 SHA-1: eb65f8cf8c64227951d0661b791e08b3d9b49f2d SHA-256: 70be69f0b8bb7c903398c334c12b3c66a653b208a11596a855105ffc2a3f9110
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain 'baarspo.ru' which is likely part of a phishing or malware distribution scheme. The PDF's structure and content suggest it's designed to trick users into visiting this malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=how+to+set+luxpro+psp511lca PDF link annotation
    • https://nuxolabebaloxuf.weebly.com/uploads/1/3/5/3/135326303/dd3c3704713847.pdfIn PDF document text
    • http://pekefosijemibi.sportsontheweb.net/lumbar_spondylolisthesis.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/satijijinono.pdfIn PDF document text
    • http://mikazuxo.mypressonline.com/soundarya_lahari_mp3_lyrics_in_tamil.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/rarebixovinuraba.pdfIn PDF document text
    • http://eushopvmn.site/sony_handycam_dcr_dvd108_manualdapoz.pdfIn PDF document text
    • https://fibupodofakakov.weebly.com/uploads/1/3/4/4/134496100/xufadosovokoban-banevovafavus-gizizelewu-vajekud.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/0416e8d87dcf.pdfIn PDF document text
    • https://kagujovo.weebly.com/uploads/1/3/5/2/135298661/42eb180.pdfIn PDF document text
    • https://sagisumofag.weebly.com/uploads/1/3/4/8/134882066/38cd05be231.pdfIn PDF document text
    • http://reawont.online/how_to_reset_nordictrack_x9io0ctw.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/rofawewazo.pdfIn PDF document text
    • http://botefin.medianewsonline.com/dynamics_physics_problems_and_solutions.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/39903a53-5146-462a-81f2-88b0987cffa3/cisco_ccna_study_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/vatewutoledelozol.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/96772490331.pdfIn PDF document text
    • http://tivexedasabuxi.myartsonline.com/autobiography_of_a_yogi_gujarati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/390729e9-04b2-49f5-9b68-2562c699b379/95216511150.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_off00011903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11903 5224 bytes
SHA-256: 7265aec68c41794696b7ce8b6331ef8ae4823fa12830befe63484a758dfdc6e1
font_01_sfnt_off00012af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF5 11572 bytes
SHA-256: 6df7e0e4df74677400af731c5f4348e33ac56148ba91bfd66f2799dcf4671f60

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