Malicious PDF — malware analysis report

Static analysis result for SHA-256 1341da2aef1ee86c…

MALICIOUS

PDF

42.0 KB Created: 2020-06-03 14:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: d72ecb55b6609c79db32004f1768ebab SHA-1: 3c3499cbbe1fdc3303c41f0b4108652bdaa45720 SHA-256: 1341da2aef1ee86ca0b6e43adfcde278696a153b983e7fe473b404a74c344bbd
96 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 of which point to other PDF files, suggesting a link farm or redirection mechanism. The document body itself is heavily obfuscated but contains references to 'Woocommerce germanized rechnung template' and URLs that appear to be part of a malicious infrastructure. The ML classifier strongly indicated maliciousness, and the PDF structure with numerous external links is a common tactic for distributing malware or facilitating phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://shopbelfast.info/uploads/1/3/0/7/130776015/130776015.html#woocommerce+germanized+rechnung+template PDF link annotation
    • http://jacquelinefoxart.com/uploads/1/3/1/0/131071315/kidojareduxadenosob.pdfIn PDF document text
    • http://goldenwisdomschool.com/uploads/1/3/1/3/131384675/fawizurog_jezebeditig_titimipagotuxu_taritivawojav.pdfIn PDF document text
    • http://livecallsecure.com/uploads/1/3/1/4/131453734/4804357.pdfIn PDF document text
    • http://webmail.vancourtcustomcabinetry.com/uploads/1/3/0/7/130776502/8457384.pdfIn PDF document text
    • http://wholesale.signopoly.com/uploads/1/3/0/4/130489475/togexuraritewir-fadev.pdfIn PDF document text
    • http://my-alberts.studio/uploads/1/3/0/5/130540789/9a2f0cfab.pdfIn PDF document text
    • http://webmail.boyertownareamulti-service.org/uploads/1/3/1/6/131637254/7ed1f33.pdfIn PDF document text
    • http://lizlaneriwellness.com/uploads/1/3/1/3/131383497/c103dec9084b.pdfIn PDF document text
    • http://moonpawdesigns.com/uploads/1/3/1/4/131483126/7063852.pdfIn PDF document text
    • http://killinitcharters.com/uploads/1/3/0/7/130776015/5981612.pdfIn PDF document text
    • http://alignwellnesscare.com/uploads/1/3/1/8/131856068/jiboma-xaxumawev-ribuxe-nokozokedem.pdfIn PDF document text
    • http://webdisk.stevenpaulsalon.com/uploads/1/3/1/3/131382808/dumiweleno_fadoxipopo_nelupafa_rujepigu.pdfIn PDF document text
    • http://mail.afghantribalarts.com/uploads/1/3/0/7/130776754/1333309.pdfIn PDF document text
    • http://absoluteperfectionsalon.net/uploads/1/3/0/6/130603954/1447904.pdfIn PDF document text
    • http://shopbelfast.info/uploads/1/3/0/7/130776015/terms.htmlIn PDF document text
    • http://shopbelfast.info/uploads/1/3/0/7/130776015/dmca.htmlIn PDF document text
    • http://shopbelfast.info/uploads/1/3/0/7/130776015/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://mabozewunes.files.wordpress.com/2020/05/wekomewadegevu.pdfIn PDF document text
    • https://buwivimew.files.wordpress.com/2020/05/fokorukeviwulerogarugurut.pdfIn PDF document text
    • https://wafukewo.files.wordpress.com/2020/05/78350571111.pdfIn PDF document text
    • https://sujefeg.files.wordpress.com/2020/05/wiluxagimivasilobifave.pdfIn PDF document text
    • https://gadixigas416133856.files.wordpress.com/2020/06/36961174158.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 3

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000714a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x714A 12524 bytes
SHA-256: d559e4f8449bc144f8142322fff5b231a5b2b03388bf2ced87830d88a4c036f1

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