Malicious PDF — malware analysis report

Static analysis result for SHA-256 13ad3a268240f043…

MALICIOUS

PDF

101.7 KB Created: 2021-02-20 03:57:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0d698ab4f6d8b562e5a61277f0f6923d SHA-1: fb0394b2b8cd0f5667fd5ad96dbef67165e94378 SHA-256: 13ad3a268240f04333c4161ad08b1d9bad4177b426302bb2c9a5ae0ed0ada7ac
186 Risk Score

Malware Insights

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

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 0.9997

Heuristics 6

  • 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 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://maypoin.ru/123?utm_term=belkin+n750+db+dual+band+wireless+usb+adapter+driver+download PDF link annotation
    • http://mir23.xyz/bluetooth_windows_xp_32_bitk0a67.pdfIn PDF document text
    • http://immortal-sho.club/14501278673pxs64.pdfIn PDF document text
    • https://zemokozovoxepuj.weebly.com/uploads/1/3/0/7/130776726/gisoliwokexotivu.pdfIn PDF document text
    • http://nubolats.xyz/photo_editor_software_for_mac_free_downloads6sk0.pdfIn PDF document text
    • https://vijekufimukij.weebly.com/uploads/1/3/0/9/130969895/xukujit-zeloluwabo.pdfIn PDF document text
    • https://maxuvejalova.weebly.com/uploads/1/3/4/2/134265339/pelito.pdfIn PDF document text
    • http://rinobozawizuvew.iblogger.org/android_framelayout_rounded_corners_programmatically.pdfIn PDF document text
    • https://romuxejis.weebly.com/uploads/1/3/4/8/134887308/3833407.pdfIn PDF document text
    • https://linoraza.weebly.com/uploads/1/3/1/4/131437671/c231c8.pdfIn PDF document text
    • https://labopepiw.weebly.com/uploads/1/3/4/7/134747507/b4dd07.pdfIn PDF document text
    • http://electriccannoz.club/5669081095925eu7.pdfIn PDF document text
    • http://fionainthefield.org/fapakovedimedawadxbc16.pdfIn PDF document text
    • http://keksik24.ru/rojuxitavvhi86.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/sda_hymnal_free_download6zlzv.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
    • http://moliposapivar.epizy.com/likaxezovagolibukidu.pdfIn PDF document text
    • http://dafiwogi.rf.gd/circular_flow_chart_visio_template.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/jufure.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/baby_doll_images.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/corrugated_bitumen_roofing_sheets_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/xekigibudavotodebal.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000142ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142AB 5588 bytes
SHA-256: fb8a7fdbd2b4606a1632727dfc974bcce1b5db68a0d72fe67ced5be3a60447ad
font_01_sfnt_off000155ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155CE 10904 bytes
SHA-256: 31d0b61a5d1e9b0a5a4723f93c6f10a69070d662f4a09f179fb6ac42a6c763e1
font_02_sfnt_off00017ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17ADA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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