Malicious PDF — malware analysis report

Static analysis result for SHA-256 421e4325babf8303…

MALICIOUS

PDF

120.6 KB Created: 2020-10-30 00:34:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 63c450ece370564bb1b55b5c51ed69c6 SHA-1: 7fd4a4bfb60a25c9b7456080f669dda516c7d64c SHA-256: 421e4325babf8303efcd612da40b05951a2577c57615c0ea2e90b6ccf3dc89f1
184 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which in turn points to a link farm hosted on disposable infrastructure. The document body, though heavily obfuscated, contains the visible text 'School tours of america reviews' and the malicious URL, suggesting a phishing or scam lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/pify?keyword=school+tours+of+america+reviews In PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/juwazuvi_zatalot_sukenoxeduma.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/xilulefurakipa.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/6613868.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/xexiraxu_jazamotixova.pdfIn PDF document text
    • https://bulavanu.weebly.com/uploads/1/3/4/3/134341337/1861257.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/fikufe.pdfIn PDF document text
    • https://rokejowavati.weebly.com/uploads/1/3/4/2/134265467/d12502ca17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f770a3e4-c914-4b62-b853-e47c5eaa6794/zusixatawilojisiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/basics_of_c_programming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1718/3654/files/molecular_weight_of_ethanol_water.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/punibevusetukesam.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/sustainable_competitive_advantage_exists_when.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9623/4902/files/41427055080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8225/9866/files/poema_de_otoo_en_ingles.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18679 5376 bytes
SHA-256: 5600d176d59a1f5319e7fed42737a13969934634998c90f865cb8273545b5f6e
font_01_sfnt_off000198aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198AA 11736 bytes
SHA-256: a18917b6c31341fbdeae2b9204ef39b37000f4b4e58ffd370569e38959f25ecb
font_02_sfnt_off0001bf74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF74 16168 bytes
SHA-256: 794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8

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