Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a0d399b726fab7…

MALICIOUS

PDF

40.6 KB Created: 2020-04-12 16:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 05014b31d6818ed6a6f64da5f6d5567d SHA-1: 3dad7888a383f7b3eb0893fb09c392e8d0ab0c25 SHA-256: c8a0d399b726fab7e483a910430a14dceecef91d33a85c59447b7b2ea7162ff4
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body text, though partially corrupted, includes a URL that matches one of the extracted links. This suggests the primary purpose is to redirect users to a network of linked content, likely for SEO manipulation or to serve as a distribution point for further malicious activities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://whyagileteamsfail.com/uploads/1/3/0/4/130488754/130488754.html#kanda+sasti+kavasam+mp3+song+free+download PDF link annotation
    • http://sweatandsparklebox.com/uploads/1/3/1/4/131407494/6023971.pdfIn PDF document text
    • http://sapphiremj.com/uploads/1/3/0/8/130874429/semeforupeguge.pdfIn PDF document text
    • http://luxcheveux.co/uploads/1/3/1/4/131438761/540b8df7.pdfIn PDF document text
    • http://taraxhouston.com/uploads/1/3/1/4/131438676/zazukej-jodoverez.pdfIn PDF document text
    • http://completerenovations.net/uploads/1/3/0/6/130621200/1231839.pdfIn PDF document text
    • http://thepurestseed.com/uploads/1/3/0/5/130550973/7a7a1d0bf1658.pdfIn PDF document text
    • http://austinintegrativepsychiatrist.com/uploads/1/3/1/1/131164210/957722.pdfIn PDF document text
    • http://dna-testi.net/uploads/1/3/0/2/130289218/12aa7044e22.pdfIn PDF document text
    • http://jjrentalcarshawaii.com/uploads/1/3/0/5/130547150/e00d7d5da4e738.pdfIn PDF document text
    • http://jacobsonbookkeepingsolutions.com/uploads/1/3/0/3/130379638/0ab48239f400a4.pdfIn PDF document text
    • http://darvasbrasil.online/uploads/1/3/0/6/130604826/208ed5be146b20.pdfIn PDF document text
    • http://captainronscozumelboatcharters.com/uploads/1/3/1/3/131380836/da41f1e77e2a9b.pdfIn PDF document text
    • http://thesockingdead.com/uploads/1/3/0/5/130589243/mefon.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off00005f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F13 8432 bytes
SHA-256: e4fdb3decd34c4318cf5eb1b1fd0e9e7e73bd16745d516b122cc32d5c107625a
font_01_sfnt_off000074e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E1 8772 bytes
SHA-256: 64445d079a02a31a6f9456ef338a331d4fcb7d41bfa85fc8a86e1b90fdb531a8

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