Malicious PDF — malware analysis report

Static analysis result for SHA-256 2837621c190aa84c…

MALICIOUS

PDF

86.2 KB Created: 2021-04-08 18:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3fcb50eb03afe970567614d0572cd8d0 SHA-1: 5e9869a131fb15cd8650c1f16aea34620a195068 SHA-256: 2837621c190aa84c34efe4b5b8e4fceb0ed0fe2d6d153b5a0e8e67a03e156dc6
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 0.9998

Heuristics 5

  • 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 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://kuzutuzo.ru/strik?utm_term=dji+naza-m+lite+multi-rotor+flight+controller+manual PDF link annotation
    • http://birodavaz.22web.org/89530553799.pdfIn PDF document text
    • https://cdn.sqhk.co/nawovoso/jijihib/90670099447.pdfIn PDF document text
    • https://cdn.sqhk.co/rujuwawuju/pijxzhe/sejikajamuxa.pdfIn PDF document text
    • http://xilenemivagola.mywebcommunity.org/24_hour_a_day_aa_book.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CBzRJjj/4831920716.pdfIn PDF document text
    • http://nokekowukubu.22web.org/what_is_modern_typography.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
    • https://uploads.strikinglycdn.com/files/ce11774c-5392-4d5d-95f0-69a42b1ffa4a/bexexonoduwar.pdfIn PDF document text
    • https://728bf1be-24e3-4891-ba98-fedceca1a503.filesusr.com/ugd/3268c8_2d7a9a7941c448978cad24ade52f22a6.pdf?index=trueIn PDF document text
    • http://gakajitaju.atwebpages.com/what_is_the_main_criticism_of_differential_association_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/881f3f2c-b9e6-477c-a3de-efc267515db5/blues_scale_guitar_exercise.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/nutoravulol.pdfIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_b5e4f276382f42bfa929c8966c09d03b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/40165063279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e144423-14cc-46bb-afd0-48d656bd19e9/65502178772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84fd6a5-bd87-45e9-aa02-588b55295d6d/jusuvizumogorivisum.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/feponurakubeluwawolafek.pdfIn PDF document text
    • http://fisubilir.epizy.com/tofewapufasedopaxofifijel.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/capello_alarm_clock_manual_cr22.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/dabijuxinoxalodekagimol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001036c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036C 5156 bytes
SHA-256: a0f15ad17c40fe449429da2179d513697b33d94b043a62b43951dbd86068b364
font_01_sfnt_off000114dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DC 11752 bytes
SHA-256: 74a0375f27e561d1c0fb720b78f87fe09376a7e992fb67120314944c5348eb29
font_02_sfnt_off00013ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE8 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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