Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9db1fa1ca3c3974…

MALICIOUS

PDF

80.5 KB Created: 2021-02-28 18:04:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e6f814c1c7522100ea8abe6e0e4bf331 SHA-1: b0ddff88fb9a08338cd562ccb76aa6fafb4a69fa SHA-256: d9db1fa1ca3c39749762348f21d904832b1c9c2fd4b43c1fe94db368b457015b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, with many hosted on disposable domains, indicative of a link farm or SEO spamming operation. One of the extracted URLs, 'https://jottigo.ru/wix?keyword=dragonvale+races+guide', suggests a potential lure related to game guides, which could be used to disguise 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://jottigo.ru/wix?keyword=dragonvale+races+guide PDF link annotation
    • https://zaxewunatomilar.weebly.com/uploads/1/3/4/1/134131499/bovusupon_momipitokufiz_dakukex_kaxovabap.pdfIn PDF document text
    • https://tolojosokuriw.weebly.com/uploads/1/3/5/3/135326177/3940408.pdfIn PDF document text
    • https://zejobivajetipud.weebly.com/uploads/1/3/0/7/130740466/lafiloxogako.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/5gejiih/zerekolop.pdfIn PDF document text
    • https://megularebenava.weebly.com/uploads/1/3/1/1/131164421/wadubazuzapit.pdfIn PDF document text
    • http://pukatasenibi.iblogger.org/pojakokunomebakib.pdfIn PDF document text
    • https://fasipibopokele.weebly.com/uploads/1/3/6/0/136096953/nuvolumo-jajovod-kofejegefim-sizil.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/bshat13/ark_survival_evolved_cheats_xbox_one_list.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/gowoperatapegizizafijed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kadoxosin.atwebpages.com/lonifexowimalas.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/zufedodova.pdfIn PDF document text
    • http://pisepivowunasi.rf.gd/64314851937.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/svuotare_cestino_android_8.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/how_much_did_the_narnia_cast_get_paid.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD0 5168 bytes
SHA-256: 5b6c948e350399c165d7e969e914b4b2ca2b652cf076488c5815db72f4782279
font_01_sfnt_off0001117f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117F 10476 bytes
SHA-256: d242705126fbfe8d09a3361ebb4a33632dff1b4fe2640c404854e68b55e71e6a

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