PDF malware analysis — malicious · e3df7d1516c843bd

MALICIOUS

PDF

80.0 KB Created: 2021-06-13 08:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 78ba6c3c96b6463ee63807184919bc4a SHA-1: f7e8863c3e9f68777b01a4e500d4de55e8c1bdee SHA-256: e3df7d1516c843bd0205e1f1f2de2edd37b30f0edd08c0bc05731d812e1cf2b0

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a 'Lewis structure worksheet'. No scripts were extracted, but the PDF structure itself facilitates redirection to malicious URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
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://soxebez.ru/123?utm_term=lewis+structure+worksheet+chem+1-+1 PDF link annotation
- https://telutifezidawu.weebly.com/uploads/1/3/4/6/134624569/dajonodujulo.pdfIn PDF document text
- https://gumakini.weebly.com/uploads/1/3/1/4/131414358/nojotelorelaz.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4449783/normal_5fdce0aabcfd1.pdfIn PDF document text
- https://fazokovonopa.weebly.com/uploads/1/3/5/3/135329702/cc6bc49ed1c8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454436/normal_5fd817de8370d.pdfIn PDF document text
- https://removevas.weebly.com/uploads/1/3/4/4/134443453/jogewulo_xomaxuxoboka.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4391303/normal_5ff0ce149e5d9.pdfIn PDF document text
- https://nepefesin.weebly.com/uploads/1/3/1/4/131410606/jatituruxo.pdfIn PDF document text
- https://vigagexagadip.weebly.com/uploads/1/3/1/8/131856194/0f2869e3a2ba3.pdfIn PDF document text
- https://nuvomananakoleg.weebly.com/uploads/1/3/1/4/131453817/d86853.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4368469/normal_60b6139910d02.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/7341323d-15ac-415f-a078-b384b04c46d7/resistance_band_workouts_weight_loss.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a3f07b4f-27e4-455a-8f98-3a3bff62e674/92131082806.pdfIn PDF document text
- http://molitutolu.pbworks.com/w/file/fetch/144536370/adobe_audition_3.0_free_download_full_version_2019.pdfIn PDF document text
- http://durerosika.pbworks.com/w/file/fetch/145155240/87814280533.pdfIn PDF document text
- http://kevuxezedila.pbworks.com/w/file/fetch/144451218/exercises_passive_voice_present_past_and_future.pdfIn PDF document text
- http://ravowibosu.pbworks.com/w/file/fetch/144613152/fashion_icon_mod_apk_free_download.pdfIn PDF document text
- http://zazipav.pbworks.com/f/43425661182.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/930af0e8-b780-48a0-988d-1a6341083077/what_happened_in_american_gods_season_2_finale.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f90d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF90D	4976 bytes
SHA-256: `78b33368bbc86086914d9a311d0229ac828c7948db9c6a9129235ae2a466bfe6`
`font_01_sfnt_off000109f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109F7	12308 bytes
SHA-256: `52beea5d2018304b36b3b137780bef35cd2a66f4ff5628288d022d0f01fea983`

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