Malicious PDF — malware analysis report

Static analysis result for SHA-256 1011189df7941099…

MALICIOUS

PDF

48.0 KB Created: 2020-03-29 10:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: bc487ea667f12f5e4a7d64a1b08c22da SHA-1: 7fb877ceeac2c5323e892cd3c8d4bac5c5e6916f SHA-256: 1011189df794109957f6ca08978526b2712a3488f322f757e457c041a0e69b8b
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL points to a HTML file that also contains a large number of links to other PDF files. This suggests a link farm or SEO poisoning attack, or a method to distribute further malicious content. No scripts were extracted, but the presence of numerous external links indicates a malicious intent to redirect the user. The ML classifier strongly supports the malicious verdict.

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://nuohotel-zh.devsite-1.com/uploads/1/3/0/9/130969916/130969916.html#petsmart+chinese+water+dragon PDF link annotation
    • http://jmitchellmasonry.com/uploads/1/3/0/6/130639393/dikawasefe.pdfIn PDF document text
    • http://lionessproducts.com/uploads/1/3/0/8/130813606/tunanawijuvijifig.pdfIn PDF document text
    • http://74-123-75-109.mgwnet.com/uploads/1/3/0/6/130639017/315738aa92b9.pdfIn PDF document text
    • http://dansalcumbe.com/uploads/1/3/0/8/130873868/409440.pdfIn PDF document text
    • http://learnliveshare.com/uploads/1/3/0/4/130478709/nobozarisubaxi.pdfIn PDF document text
    • http://www.habersatguitar.com/uploads/1/3/0/5/130551116/cb0ddca8.pdfIn PDF document text
    • http://junglegymcuenca.com/uploads/1/3/0/5/130538863/4613785.pdfIn PDF document text
    • http://www.world-of-amor.com/uploads/1/3/0/2/130288962/zikanoxej_govujekejur_pezelefizum.pdfIn PDF document text
    • http://flowersofthefield.me/uploads/1/3/0/6/130605422/rufosidixorarideni.pdfIn PDF document text
    • http://thecarvingartistshoppe.com/uploads/1/3/0/2/130271161/5de7e.pdfIn PDF document text
    • http://roswellwaterproofing.com/uploads/1/3/0/4/130483745/99393ef5.pdfIn PDF document text
    • http://painfulhipresurfacing.com/uploads/1/3/0/7/130738861/wiruvowizanori_gigaruxok_xatemib_revawerowiduro.pdfIn PDF document text
    • http://12bankfootdrive.com/uploads/1/3/0/5/130543364/938a9.pdfIn PDF document text
    • http://manangkala.net/uploads/1/3/0/9/130969939/dobug.pdfIn PDF document text
    • http://skinpigmentdisorders.com/uploads/1/3/0/5/130551559/faruwaji.pdfIn PDF document text
    • http://minimatisse.shop/uploads/1/3/0/2/130287895/9a903077e99e964.pdfIn PDF document text
    • http://brandonotes.net/uploads/1/3/0/3/130324331/9325408.pdfIn PDF document text
    • http://mountainlights.us/uploads/1/3/0/8/130813899/gaxoni.pdfIn PDF document text
    • http://autodiscover.riavoice.com/uploads/1/3/0/7/130775817/133841121013f.pdfIn PDF document text
    • http://philiphogan.org/uploads/1/3/0/7/130739933/8230367.pdfIn PDF document text
    • http://porterforcanton.com/uploads/1/3/0/6/130603913/wulitoxavegapenuxese.pdfIn PDF document text
    • http://checkeredmedia.com/uploads/1/3/0/4/130435688/6727888.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

Related samples 1

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_off0000924b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x924B 8328 bytes
SHA-256: 535ac89f9f7de6d631a62b0c3c8ee3e3469ff1965c9ae39530357a494121b2c0

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