PDF malware analysis — malicious · 1adb548ce2b9f7df

MALICIOUS

PDF

60.6 KB Created: 2020-10-28 19:49:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: a4144ad7df373319143c46623203445d SHA-1: 80000dad8f220325e2eab981ec8574a1396a4107 SHA-256: 1adb548ce2b9f7df925c822e71612dfe5dbb8053bc7ff26657d8846c6d6c0d71

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
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://cctraff.ru/wb?keyword=onward%20christian%20soldiers%20music%20sheet%20pdf In PDF document text
- https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/9227132.pdfIn PDF document text
- https://sazoxizifa.weebly.com/uploads/1/3/4/5/134505384/9445712.pdfIn PDF document text
- https://lusukukupesakub.weebly.com/uploads/1/3/0/8/130815137/pedobezed.pdfIn PDF document text
- https://newejata.weebly.com/uploads/1/3/3/9/133999860/6d56a.pdfIn PDF document text
- https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/310717.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0476/5794/3206/files/global_variables_in_css.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5346/5243/files/body_cavities_diagram_with_organs.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0502/0116/6000/files/wool_bag_wow.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0476/0403/9836/files/casio_g-shock_aw-591ms-1aer_manual.pdfIn PDF document text
- https://s3.amazonaws.com/susopuzupure/83934412573.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0268/7424/9402/files/fundamentals_of_pathology_pathoma_2016_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/6037/9286/files/several_means_how_much.pdfIn PDF document text
- https://s3.amazonaws.com/leguvefu/64707982992.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/9028/0609/files/nodogixeviwobewapos.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0499/8823/9510/files/quince_en_ingles_traductor.pdfIn PDF document text
- https://s3.amazonaws.com/damerirazib/affidavit_for_address_proof_format.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/2775/8763/files/crit_damage_rune_lol.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/7877/9047/files/que_es_nutricion_holistica.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files/alphabet_colouring_worksheets.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/6961/1418/files/19543574841.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/3870/2748/files/android_show_loading_spinner_asynctask.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/8075/1006/files/free_trumpet_sheet_music.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0486/0752/7077/files/gurgaon_metro_map.pdfIn PDF document text
- https://s3.amazonaws.com/bubisifapagefe/31555847108.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_005_off0000b6e5.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xB6E5	26324 bytes
SHA-256: `e87c4b32cbf87648f0a2e66467760e8f8170cb0c585fc43182157b4f6473f3a3`
`font_00_sfnt_off00007ecd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7ECD	5512 bytes
SHA-256: `0b2b84afb6339dae4931cfdd58225849422eeca66450055eaaa51a03ad26cbbd`
`font_01_sfnt_off00009170.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9170	10848 bytes
SHA-256: `791ff3429092cd5d701947b7ceb60bcadd566717e8bd50661c67f157d5f355d1`

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