Malicious PDF — malware analysis report

Static analysis result for SHA-256 07add93f0238e648…

MALICIOUS

PDF

41.1 KB Created: 2020-11-06 15:44:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6b1162400eeab2365b48dcf4e1316283 SHA-1: 935358a27a492e89565f28a460a3c4ca2f6edf63 SHA-256: 07add93f0238e648bec591241f970551d28a01b547a1165a7922607a8db989fd
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 https://trafftec.ru/123?keyword=playstation+manual+system+update PDF link annotation
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/939334e.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/5671579.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/vujoloz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gexixixuda/rick_s_sports_bar_pittsburgh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9afa9c04-c8d6-465f-b957-dbce96c559f0/matilda_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/333d125a-6bbe-4468-98a3-5408a49a289c/tukopusirutusipedije.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/nebaj.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/fedolunubixudomidotek.pdfIn PDF document text
    • https://fefitaw.files.wordpress.com/2020/11/64939725781.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/superfighters_unblocked_fullscreen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ce454b-6fe2-4aa1-8968-4a6926645cd2/manual_for_alexapure_breeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/173fa88c-dde4-4fcc-8579-3f6d176d53f7/tamewideva.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/domesivoposikik.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5355 4996 bytes
SHA-256: 0c927b334a47c08fdd125c3f8039fbc278ba43d3961d20d64f8cf0613dc1f61e
font_01_sfnt_off0000643b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643B 10288 bytes
SHA-256: 374f777111edb56ac423f29155e5652388139973e46fafe941b4eeb6dfc3247f
font_02_sfnt_off000087a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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