Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15a3db352052acd…

MALICIOUS

PDF

78.6 KB Created: 2021-04-05 00:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7742f794064bc98c087451e53d63ccdf SHA-1: cf7ae6feae69c95d76abc017e8517aa8b95c0a78 SHA-256: d15a3db352052acda2a31592c3d60ce43ed8a066f24d516c20ec0d90368ec0a5
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://soxebez.ru/award?keyword=pdf+to+ms+word+converter+online+free+download PDF link annotation
    • http://vumogegotawugub.mypressonline.com/sovowadeb.pdfIn PDF document text
    • https://vowagogo.weebly.com/uploads/1/3/5/3/135307183/8378041.pdfIn PDF document text
    • https://vegekonewipure.weebly.com/uploads/1/3/5/9/135964828/963713.pdfIn PDF document text
    • http://kofupum.mygamesonline.org/zijigukag.pdfIn PDF document text
    • https://pajenugemin.weebly.com/uploads/1/3/4/6/134677616/bavudofosa.pdfIn PDF document text
    • http://kivudutamazawan.22web.org/wexevaxasojiwojedu.pdfIn PDF document text
    • https://sidufuzijek.weebly.com/uploads/1/3/4/5/134598689/1413192.pdfIn PDF document text
    • http://rowaxamapitowej.getenjoyment.net/how_to_fix_a_hermle_clock.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/automotive_diagnostic_fault_code.pdfIn PDF document text
    • https://siviwoxepigomuz.weebly.com/uploads/1/3/0/7/130739754/443201.pdfIn PDF document text
    • https://nubodizigo.weebly.com/uploads/1/3/5/3/135346475/7403494.pdfIn PDF document text
    • https://vedatirujoxe.weebly.com/uploads/1/3/1/6/131606280/6830028.pdfIn PDF document text
    • https://xokiguju.weebly.com/uploads/1/3/4/6/134679394/d75ba28a.pdfIn PDF document text
    • http://vujejike.iblogger.org/62617170970.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/mariachi_trumpet_music.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://lepugip.epizy.com/cantico_delle_creature_testo.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/adblock_free_windows_10_mozilla_firefox.pdfIn PDF document text
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_cc542583cca54d4c9f34806aa1320ddd.pdf?index=trueIn PDF document text
    • http://vizawog.epizy.com/sunakuveraxube.pdfIn PDF document text
    • https://691dfa98-c543-4342-b77d-a3d7fbf094aa.filesusr.com/ugd/d55835_4aa6d9b55955475a8674f0c8549aa7d9.pdf?index=trueIn PDF document text
    • https://36d3fe4d-ce77-4ecd-ae21-04b42370c250.filesusr.com/ugd/871c54_2358159596d141a2967dc4b771d942ca.pdf?index=trueIn PDF document text
    • http://tatoguninorevem.epizy.com/30057963172.pdfIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_df5219f188b244edb58401c2228ad1f3.pdf?index=trueIn PDF document text
    • https://298c7861-702e-4dad-8e6b-798164301c36.filesusr.com/ugd/98adb1_56c9d63ba2354d0fa0268e58234f3fb3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fazujo/16451734902.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_off0000e77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77E 5108 bytes
SHA-256: ce9b4a56b814ed5c8eed1c9840518d2ccacb405e9e9d4762d47de0c7f1f98247
font_01_sfnt_off0000f8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D0 10852 bytes
SHA-256: 435556ef214a1d58adac0c386b0eb80009d2893c42d7b6682ceff5573e039029
font_02_sfnt_off00011ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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