Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71fc44be1c06e00…

MALICIOUS

PDF

48.6 KB Created: 2020-03-13 09:13:11 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 888b752a5478dee1ad90d4f8d051afb1 SHA-1: 4b4551c9045c89db07c05241ff073a4c2cd5072a SHA-256: d71fc44be1c06e00f42e7981405eff2c68489bc679ba19e8be7f68d4717dc014
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO poisoning attempt. The document body, though heavily obfuscated, contains one of these URLs, indicating the primary intent is to redirect the user. No scripts were extracted, limiting further analysis of payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://abyss37.pleasingfood.com/uploads/1/3/0/2/130287815/130287815.html#symbiotic+commensalism+relationship PDF link annotation
    • http://timtosuccess.com/uploads/1/3/0/4/130494743/senot-texedunomivem.pdfIn PDF document text
    • http://mail.tokyodrivingschool.com/uploads/1/3/0/9/130969004/gurotet_vorojesixel_sodopujafeturi.pdfIn PDF document text
    • http://ethicalorganicbiz.com/uploads/1/3/0/6/130639116/betajizejekun.pdfIn PDF document text
    • http://itsjuicybih.com/uploads/1/3/0/2/130287504/sexosebazatakojugida.pdfIn PDF document text
    • http://docmarksrun.com/uploads/1/3/0/4/130478484/f7f5ba8c380d38a.pdfIn PDF document text
    • http://theworldofboden.com/uploads/1/3/0/5/130548070/xugovakazak_pasaked_ronerul_tobomipalabib.pdfIn PDF document text
    • http://elmersanchez.com/uploads/1/3/1/1/131164097/1413971.pdfIn PDF document text
    • http://detroitlegalalliance.com/uploads/1/3/0/4/130435667/8b15a7d.pdfIn PDF document text
    • http://daves-tees.co.uk/uploads/1/3/0/3/130324050/wuvisox-mukogujefekim.pdfIn PDF document text
    • http://iampreformance.com/uploads/1/3/0/5/130550697/givamuvalu.pdfIn PDF document text
    • http://anarchyflags.com/uploads/1/3/0/7/130738929/dbb405541cffcc.pdfIn PDF document text
    • http://pe-uae.com/uploads/1/3/0/5/130590229/bokovigolefowi_rowagozubuwe_pafuzuxeta_sipimava.pdfIn PDF document text
    • http://michelleleblancshortstories.com/uploads/1/3/0/7/130738576/6008218.pdfIn PDF document text
    • http://root.wcpha.org/uploads/1/3/0/3/130379804/8723885.pdfIn PDF document text
    • http://www.squareunited.com/uploads/1/3/0/5/130546538/zoliwizilaxetel.pdfIn PDF document text
    • http://cristawadsworth.com/uploads/1/3/0/7/130738933/naromogedutav-viwesinewulo-gudusufi.pdfIn PDF document text
    • http://squirreleyesent.com/uploads/1/3/0/3/130313541/rusebupijeselefa.pdfIn PDF document text
    • http://devinandjessica.com/uploads/1/3/0/3/130324351/2722648.pdfIn PDF document text
    • http://frankebillingsley.com/uploads/1/3/0/6/130621973/662d1816739.pdfIn PDF document text
    • http://rowlandhomeappliance.com/uploads/1/3/0/2/130271023/sonorosalisadeboxope.pdfIn PDF document text
    • http://god-almighty.com/uploads/1/3/0/3/130324037/rifelabon_zowugogopinoxar_zugozivubajuto.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 1

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_off00008214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8214 7628 bytes
SHA-256: f5c59bbf04464e9bcc02d8bbcea7136c38171ec4ebe981d8191319eb485d5651
font_01_sfnt_off00009fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE8 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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